Kosaka Lab

Student

Introduction

Our laboratory is very ambitious and is working on several national projects.
Would you like to learn more about “quantum technology” that will lead science and technology in Japan?
You will be able to learn about the cutting-edge engineering technologies of quantum technology, such as circuit, programming, equipment, AI, precision measurement, laser, wireless technology, security, communication, image processing and machine learning.

Research Topics

(1) Diamond quantum repeaters for the quantum internet
(2) Diamond quantum interface to establish a quantum computer network
(3) Fault-tolerant quantum computers with quantum error correction

An Opportunity for International Collaborative Research: We’re Participating in the ASPIRE “Japan-Germany Quantum Technologies,” Project!


What is ASPIRE?
ASPIRE is a program that promotes international collaborative research with the goal of advancing Japan’s scientific and technological capabilities.

Top researchers from Japan and around the world come together to conduct joint research on cutting-edge science and technology. Our current project, “Diamond spin qubits for quantum applications (DIAMONDQTECH),” is being carried out under the leadership of:

  • Japanese Principal Investigator:Dr. Takeshi Oshima, Director of the Takasaki Institute for Advanced Quantum Science, National Institutes for Quantum Science and Technology (QST)
  • German Principal Investigator: Professor Fedor Jelezko of the Institute of Quantum Optics, Ulm University, Germany

Our lab is participating as a Co-PI in the field of quantum communication.

Highlights for Students:

  • Opportunity to study abroad — Gain research experience at some of the world’s top universities
  • Hands-on exposure to cutting-edge quantum technology — Be at the forefront of international collaborative research
  • Financial support for your stay abroad — The lab will cover your travel and living expenses so you can focus on your research with peace of mind

If you’re interested in studying abroad or conducting research in an international environment, we encourage our students to take on this exciting challenge!

New Admission Path Starting in 2026: Apply via the Interfaculty Graduate School of Innovative and Practical Studies

The Interfaculty Graduate School of Innovative and Practical Studies at Yokohama National University was launched in 2021 as a unique graduate school that integrates diverse academic fields across the humanities and sciences. It brings together four graduate schools, the Graduate School of International Social Sciences, Graduate School of Urban Innovation, Graduate School of Environment and Information Sciences, and Graduate School of Engineering Science, to offer interdisciplinary and cross-cutting education.

Starting in the 2026 academic year, our lab will join this program, under the research theme “Integrated Electronics” and specializing in quantum computing, quantum communication, and quantum information.

Until the 2025 academic year, applications for our lab were only possible through the Graduate School of Engineering Science. From 2026 onward, applications will also be accepted via the Interfaculty Graduate School of Innovative and Practical Studies. In addition, applicants may apply to both graduate schools simultaneously using a single, unified entrance examination.

We warmly encourage not only students from Yokohama National University but also those from other universities to take advantage of this new opportunity and consider applying through both programs.

▶︎ Interfaculty Graduate School of Innovative and Practical Studies website

Reasons to study with us

  • Quantum Information is a future-breaking technology promoted by the Japanese government, along with AI and Robotics.
  • You will have an advantage in employment as quantum information has become key to the business strategy of many top companies and venture companies.
  • We have a strong connection with the industry, national laboratories, and prominent universities overseas.
  • Many of our students have landed jobs in top companies and venture businesses.
  • You will get to study physics while also learning about related fields. e.g., engineering and information science.

Career records

  • IDC Frontier
  • SCSK (2 persons)
  • Anritsu
  • NTT Communications
  • NTT Data
  • Core Concept Technologies
  • Semiconductor Energy Laboratory
  • Hitachi (3 persons)
  • Nomura Research Institute
  • Murata
  • Kensetsugyou Fukushi Kyousaidan
  • Tokyo Electron
  • Tokyo Electric Power Company Holdings
  • TOSHIBA
  • Toshiba Infrastructure Systems & Solutions Corporation (TISS)
  • Toyota
  • Nidec
  • NTT (2 persons)
  • Hamamatsu
  • Fujitsu (2 persons)
  • Furukawa Electric
  • Micron
  • Sumitomo Mitsui Card Company
  • Mitsubishi Motors
  • Lasertec
  • Leverages
  • Kyushu University Graduate School
  • The University of Tokyo graduate school (2 persons)
  • Tokyo Institute of Technology graduate school (2 persons)
  • Tohoku University graduate school (2 persons)
  • Monash University Graduate School
  • Yokohama National University

What our students think

  • 吹き出し

    The guidance of senior students helped me to acquire new skills.

  • 吹き出し

    I was amazed by the research facilities and research funds available to undergraduate students.

  • 吹き出し

    Even as an undergraduate student, I can present at national physic conferences.

  • 吹き出し

    During my master’s course, I could become a leading author and publish articles in outstanding journals like Nature Portfolio.

  • 吹き出し

    The doctorate course offers a wide range of income-earning options, such as positions as a Research Assistant.

  • 吹き出し

    There is a certain degree of freedom when doing your research. As you grow, you encounter great research opportunities.

  • 吹き出し

    If you want, you can go abroad to study.

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