- 2012 - 2017 Broadband seismological observation in Greenland and study of Greenland icequakes
- 2009 - 2011 Determination of deep structure under Japan using waveform inversion and Spectral-Element Method
- 2007 - 2008 東アジアにおけるマントルの不連続面と異方性の詳細なマッピング
- 2004 - 2008 High resolution seismic tomography of stagnant slabs
- 2004 - 2006 西南日本-朝鮮半島における660km不連続面の深さ異常の面的マッピング
- 2004 - 2006 Study of Earth's inner core using synthetic seismograms calculated by Spectral-Element method
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