2009.3
- 2009.5 |
Researcher, Department of Mathematics, Arizona State University |

2009.6
- 2009.8 |
Researcher, Department of Mathematics, Sungkyunkwan University |

2009.9
- 2010.8 |
Researcher, Institute for Mathematics and Its Applications (IMA),, University of Minnesota |

2010.9
- 2011.5 |
Researcher, Pacific Institute for the Mathematical Sciences (PIMS), University of Victoria |

2011.6
- 2014.3 |
Research Associate, Department of Mathematics, Hokkaido University |

2014.4
- 2016.3 |
Associate Professor, Department of Mathematics, Tokyo Institute of Technology |

2016.4
- 2021.8 |
Associate Professor, Graduate School of Mathematical Sciences, The University of Tokyo |

2021.9
- |
Professor, Graduate School of Economics, Hitotsubashi University |

2021.9
- |
Professor, Faculty of Economics, Hitotsubashi University |