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2017 summer internship at IIJ Innovation Institute's Research Laboratory, Tokyo, Japan

(Last updated: 2016-12-1)

Please check the FAQ section if you have any questions before contacting us.


IIJ Innovation Institute (IIJ-II) Research Laboratory conducts advanced research and technology development on the Internet. The researchers, strongly collaborating with the WIDE Project, were long involved in IPv6 standardization and its BSD stack implementation (KAME project), published well known national Internet traffic measurements and analysis for the last years (MAWI project), endeavored to establish a securer interdomain routing protocol, and to experiment with ecological data centers as well as cloud services.

We are looking for motivated interns who can work with us to accelerate our projects by researching problems, proposing solutions, implementing tools, making various simulations, and so on. By joining us, you can get high quality experience in our research laboratory, can communiate with forefront researchers, have time to discuss with other qualified interns, which will be all benefit to your future carrier plan.

Table of Contents

Compensation and Working Environment

IIJ-II will pay its interns a competitive wage and provide a comfortable research environment with abundant opportunities to gain Internet focused R&D experience.

  • Wage: 250,000JPY/Month (social security expenses and taxes will be subtracted depending on your work contracts)
  • Travel expense is provided
  • Location: Tokyo, Japan
  • Period: 2 months (negotiable depending on the schedule of your Univ.)
  • Accommodation is provided if it is difficult to commute
  • Insurance: Workers' accident compensation insurance (Travel and off-time accident insurance are not covered, we strongly suggest you to prepare them by yourself)

Administrative Details

  • Candidates should be university students (university registration holding for the duration of the internship) with a strong motivation toward research. See project details for the technical expertise required for a specific project.
  • Summer internship for a duration of 2 months in IIJ-II Reasearch Laboratory.
  • To apply for an intern position, send the following documents to internship@iij.ad.jp.
    • CV
    • A cover letter explaining your interest in the job
    • The project name you are interested in
    If available, please send the following documents as well.
    • A letter of recommendation
    • Your recent published papers
    We will hold face-to-face or remote interviews with applicants before taking a final decision.
  • Application must be submitted by the end of January 2017. The notification date is the end of February.
  • If you have any questions, please send a message to internship@iij.ad.jp.

Available Projects

Traffic Measurement and Data Analysis


It is essential for IIJ to understand recent trends in customer traffic.

We will provide an internship student an opportunity to work on a small measurement project, possibly using real-world datasets from IIJ's services, in order to provide practical feedback to IIJ's services.

Possible topics are:

  • development of traffic visualization tools (e.g., for multi-dimensional traffic time-series or for video streaming quality)
  • development of algorithms to provide compact summary information of large-scale traffic data
  • development of tools to collect and analyze behaviors of HTTP video streaming clients (e.g., MPEG-DASH implementations)
  • analysis of video streaming traffic behaviors (e.g., differences in video segment fetching strategies)
  • modeling and simulation of network traffic
  • development of monitoring tools for large-scale measurement platforms (e.g. detect outages or identify physical topology from traceroute datasets)
  • analysis of syslog messages for finding possible threats or misbehaviors


We are looking for a graduate student for a two-month-long full-time internship. Candidates should have good skills in computer networking, UNIX systems, and programming as well as oral and written communication skills in English.

For data analysis, skills in machine learning techniques and knowledge of statistics are also required.

To complete a project in two months, a candidate should have substantial experiences in the selected research topic.

Host Researchers

Internet Routing


The objective of the internship is to provide interns with opportunities to measure, develop, and enhance Internet routing protocols.

Among the possible topics are

  • the mining of big data, such as the detection and correlation of control and data plane events
  • the development of tools to identify protocol deployment or routing implementation issues
  • the study, measurement, and development of routing protocol security architecture, designs, and mechanisms
  • the study and evaluation of routing protocol extensions
  • building a testbed to see that a router correctly performs RPKI-Based Origin Validation
  • work on medium scale, O(1000) routers, simulation of BGPsec deployment
  • secure measurement of network performance

The intern will receive support and feedback from IIJ Research Laboratory and a range of external research collaborators along the way.


We are looking for a graduate student in Computer Science or Electrical Engineering to complete a two month full-time internship. Candidates should be competent in networking (IPv4, IPv6, TCP), UNIX systems, and C or python programming. Knowledge of IP routing protocols (BGP, OSPF, IS-IS) would be a plus. In addition to the above, candidates should have strong practical and problem-solving skills, the ability to independently produce high quality work, and good English oral and written communication skills.

Host Researchers

Network System Automatic Control


The objective of the internship is to provide interns with opportunities to research and develop network system management technologies to implement Service Defined Infrastructure(SvDI). Intern will chose one of following topics:

  • Automatic management controller for network resource
  • Network resource database
  • Automatic location algorithm for defined service
  • The Interface between Service definition and resource controller


We are looking for a graduate student in Computer Science or Electrical Engineering to complete a two month full-time internship. All candidates should be competent in networking, UNIX system, and C/Java/python programming. Knowledge of network management, server management would be a plus. In addition to the above, candidates should have strong practical and problem-solving skills, the ability to independently produce high quality work, and good Japanese or English oral and written communication skills.

Host Researcher

Cloud Infrastructure


The main objectives of the internship program is to provide an opportunities to research and develop for the "energy efficient cloud computing platform" that include Data Center technologies. Interns will chose one of the following research area:

  • software controlable datacenter
  • cloud orchestrator + datacenter
  • software defined data center facility
  • visualization, human computer interaction, operation support system for massive scale datacenters
  • other related research areas (decided with the presentation by the internship participant)


We are looking for a graduate student in Computer Science or equivalent to complete a two month full-time internship. Candidates should be competent in Unix operating systems (*BSD and/or linux), having the experience of the userland programming development on them. (The programming language is not restricted: but python, ruby, C and javascript expert is very welcome)

Host Researchers

Virtual Machine Operation Management

The objective is to design and develop scalable virtual machine operation management tools and systems.

Possible topics are:

  • developing a status monitoring subsystem based on RFC7666 for KVM


We are looking for graduate students who have the following knowledge and skills.

  • Knowledge of computer science and networking technology (or equivalent)
  • Skills of programming languages (C)
  • Knowledge and experience of Linux operation

Host Researcher

Library Operating System

With the name of specialization, various academic and open source projects invented different shape of network stacks and operating systems. While the specializations avoiding generalization tax solve specific problems of network stack, those are often coupled with the downgraded features due to the specializations, which are hard to recover because the feature richness usually comes with the incremental growth of operating systems.

As a result, there are still serious problems of conventional network stack and library operating systems (or userspace network stacks):

  • network stack ossification (hard to introduce new features), lack of personality
  • lack of generality, resulting no legacy application support
  • simply waste of time (if it is implemented from scratch)

The primary goal of this project is 1) to alleviate the current issue of network stacks, and 2) to retain the feature-richness of the current operating systems by morphing a monolithic kernel into an anykernel implementation (a.k.a. library operating system). The concept of library operating system is not new but it is emerging to address current issues on operating system and network stack.

The objective of this project is to design and develop an implementation of library operating system, Linux Kernel Library (or LKL), to solve aforementioned issues of current operating system.

Possible topics (but not limited to) are:

  • supporting general applications with feature-rich network stack
  • benchmark studies with the implemented software to understand the bottlenecks (incl. comparison with alternatives)
  • develop LKL as a base of Unikernel with the particular application runtime


We are looking for graduate students who have the following knowledge and skills.

  • Knowledge of computer science and networking technology (or equivalent)
  • Skills of system programmings in C
  • Knowledge and/or experience of Linux kernel development
  • Knowledge and/or experience of network performance benchmarks

Host Researcher

Messages from Alumni

Anant Shah (Year 2016)

I am very thankful to have received the opportunity to visit IIJ-II for the summer internship in 2016. Working side-by-side with very talented researchers on a challenging topic gave me the chance to grow as a researcher and get valuable feedback on my work.

I was graciously offered to pick a topic that helps my PhD thesis. I closely worked with Romain Fontugne and Randy Bush on detecting internet outages using a light-weight algorithm on the RIPE Atlas data. Emile Aben from RIPE NCC and Cristel Pelsser from the University of Strasbourg were also actively involved. I learned a lot from all of them, they were very approachable and encouraged discussion on various ideas or questions I had. I felt like a part of the team in just 2 months and I can't wait to collaborate on more work with them.

I also had a great time interacting with other researchers in the lab. We had a few social activities organized and I loved talking to everyone about them, their research and their life in Japan. Big thanks to Kenjiro Cho and Keiichi Shima, who on several occasions joined us for lunch and helped understand the menu, Japanese traditional food, and customs. My experience in Japan would not have been so delightful without the help of Naoko Kitamura. She took care of arranging flights, providing detailed directions on how to get to the accommodation, bank accounts, and numerous other small details that needed translation. In some ways, she is the lab's go-to person for all logistics and help.

Tokyo is a beautiful city and a very vibrant community. There is something new to do every day and something new to learn about Japanese culture every day. The people of Tokyo are very polite and helpful. While speaking Japanese is an added advantage, it is not necessary to get around and experience the city.

I highly recommend joining the internship and taking advantage of this wonderful opportunity.

Stefano Tracà (Year 2016)

The internship at IIJ-II is one of the best summer experiences you can hope for.

The laboratory is a synergetic environment where everyone brings their knowledge and is ready to learn from other brilliant international researchers. I worked closely with Keiichi Shima on detecting anomalies in large volumes of network-generated system log messages. Interns are supervised and helped in their research by their mentor, but are in charge of their project.

Moving to Japan for two months was much easier than expected. IIJ-II was impeccable in providing all the required paperwork for the Visa application, a very comfortable accommodation close to the workplace and some of the most exciting neighborhoods of Tokyo, flights, and a lot of suggestions for weekend activities, restaurants, and wonderful sightseeing. The Innovation Institute also organizes every year a very fun retreat to share feedback on all the projects and enjoy amazing food and hot springs.

I think the internship has been an excellent opportunity to grow intellectually, make new friends, and explore an unforgettable city. I recommend young researchers to join the program!

Argyrios Tasiopoulos (Year 2016)

The internship at IIJ-II was an amazing experience in so many ways. During the program, I worked on the QoS improvement of Shared Media Services under the guidance of Dr. Ray Atarashi.

I appreciate the opportunity that I had to invest my time creatively, working in an interesting project, surrounded by friendly and kind people who were always there to offer their advise both in academic and social matters.

On the practical aspects of my trip, IIJ-II had arranged all the details including my flight tickets and accommodation, making sure that I would have a pleasant stay in Tokyo. Thanks to this hospitality I was able to get the most out of my journey, experiencing the rich Japanese culture and tradition while exploring Tokyo.

I believe that the internship at IIJ-II is the best choice I could have made and I would totally recommend the program to ambitious research-oriented students; who would like to spent their summer in a creative environment next to world-class researchers.

Julien Gamba (Year 2016)

In 2016 I was part of the IIJ Innovation Institute summer internship program. I worked on Internet routing with Randy Bush and Romain Fontugne, studying the fragmentation of the BGP routing table. It was an amazing experience on many levels. I had the opportunity to work with very good researchers, to talk about my work with researchers from very different fields and to discover the Japanese culture. I knew close to nothing about Japan so every day brought its share of discoveries.

Everything is arranged for you before you enter Japan (visa, accommodation, bank account, etc...) so you do not have to worry about anything even if you do not speak a word of Japanese. Many thanks to Naoko Kitamura for having taken care of everything for us interns!

Overall I am really happy to have been part of this program, and will definitely do it again if I can.

Past Members

Year 2016

  • Anant Shah, Colorado State University, U.S.A.
  • Argrios Tasiopoulos, University College London, United Kingdom
  • Julien Gamba, University of Strasbourg, France
  • Răzvan Certezeanu, Imperial College London, United Kingdom
  • Stefano Tracà, Massachusetts Insitute of Technology, U.S.A.

Year 2015

  • Alessandro Puccetti, University of Pisa, Italy
  • Daniel Gröber, Leopold-Franzens-Universität Innsbruck, Austria
  • Kenichi Takagiwa, Keio University, Japan
  • Lachlan Kang, The University of Adelaide, Australia
  • Mijung Kim, Stony Brook, Korea
  • Minoru Kanatsu, Osaka University, Japan

Year 2014

  • Daniele Iamartino, Politecnico di Milano, Italy
  • Gaëtan Briot, Université catholique de Louvain, Belgium
  • Tao Peng, University of Trento, Italy
  • Thomas Holterbach, University of Strasbourg, France

Year 2013

  • David Hauweele, Université de Mons, Belgium
  • Yaser Jararweh, Jordan University of Science and Technology, Jordan
  • Hyoyoung Lim, Nagoya University, Japan
  • Doudou Fall, Nara Institute Science and Technology, Japan

Year 2012

  • Andra Lutu, University Carlos III Madrid, Spain
  • David Lebrun, Université catholique de Louvain, Belgium
  • Hirokazu Hasegawa, Nagoya University, Japan
  • Julien Beaudaux, University of Strasbourg, France
  • Nam Dang, Tokyo Institute of Technology, Japan
  • Zachary Bischof, Northwestern University, U.S.A.

Frequently Asked Questions

General information

When will the application be open?

The summer internship application will be open at the beginning of December every year.

How long is the summer internship program?

The program is for 2 months.

What are the start and end dates for the program?

Interns are able to select either from July 1st to August 31st or August 1st to September 30th. However, it is negotiable depending on the schedule of your university.

Can I extend the internship program?

No, this summer internship program is only for 2 months.


Do I need to obtain a visa?

Yes, you will obtain a 3 month Designated Activities visa.

What are the required documents for obtaining visa?

Our admin staff will contact with you regarding the documents once the duration of your program is fixed.

What are the procedures for obtaining the visa?

IIJ-II will submit the required documents to Tokyo Immigration Office to obtain a certificate of eligibility for your visa.

When the certificate is issued, we will post it to you. After you receive the certificate, please go to the Japanese Embassy or consulate in your country to obtain the visa with your passport as soon as possible.

How long will it take the certificate of eligibility to be issued?

It will usually take about 1.5 to 2 months.


Where can I stay during the internship?

IIJ-II will provide a furnished apartment near the office. Interns usually stay near Kanda Station in Tokyo. Please note that the accommodation is subject to change depending on the availability.

When can I get the detailed information regarding the accommodation?

IIJ-II will inform you of the details about 3 weeks before your arrival.

Flight ticket

Will IIJ-II pay for my flight?


When can I get the details of my flight?

IIJ-II will arrange the flight ticket after the certificate of eligibility is issued.

I would like to fly from France and fly back to US. Could IIJ-II provide the whole flight tickets?

No, we will provide a round trip ticket only.

Other information staying in Japan

Will travel insurance be provided by IIJ-II?

No, IIJ-II will not provide the insurance. You must make your own arrangements to join a travel insurance plan before you leave for Japan. We recommend that you have travel insurance which also covers flight delays, lost baggage etc.

How can I receive my salary? Do you transfer to my overseas account?

You will open a Japanese bank account for your salary payment on your first working day. We will not transfer your salary to your overseas account.

When is the pay day?

The pay day is on 25th every month, so you will need some money for day to day expenses until this date.

Can I do some sightseeing after the internship is finished?

The visa is only for the internship, not sightseeing, therefore we would not recommend that you could stay longer after the program is finished. In case of extending your stay, the accommodation will not be provided by IIJ-II.

I have some additional questions about Summer Internship Program. Who can I contact?

Please contact internship@iij.ad.jp.

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