Japanese Research Interest : Number Theory, in particular, Elliptic Curves and Iwasawa Theory.
Papers (published or to be published soon)

  1. Mordell-Weil ranks of elliptic curves in the cyclotomic Z2-extension of the rationals
    to appear in Int. J. Number Theory
  2. Elliptic curves with large Tate-Shafarevich groups over a number field
    Math. Research Letters 16-3 (2009), 449-461.
    MR 2511625 / Zbl
  3. On the 2-adic Iwasawa invariants of ordinary elliptic curves
    Int. J. Number Theory 4-3 (2008), 403-422.
    MR 2424330 / Zbl pre05507939
  4. Construction of elliptic curves with large Iwasawa λ-invariants and large Tate-Shafarevich groups
    manuscripta math. 122-3 (2007), 289-304.
    MR 2305419 / Zbl 1152.11045
  5. A note on the variation of Mordell-Weil ranks of elliptic curves in cyclotomic Zp-extensions
    Proc. Japan Acad. 79 Ser. A (2003), 101-104.
    MR 1980609 (2004c:11088) / Zbl pre02052922
  6. Finite Λ-submodules of Selmer groups of abelian varieties over cyclotomic Zp-extensions
    J. Number Theory 99 (2003), 415-443.
    MR 1969183 (2004c:11098) / Zbl 1045.11042
  7. On finite Λ-submodules of Selmer groups of elliptic curves (with Y. Hachimori)
    Proc. Amer. Math. Soc. 128 (2000), 2539-2541.
    MR 1690989 (2000m:11046) / Zbl 1053.11049
  8. An analogue of Kida's formula for the Selmer groups of elliptic curves (with Y. Hachimori)
    J. Algebraic Geometry 8 (1999), 581-601.
    MR 1689359 (2000c:11086) / Zbl 1081.11508
  9. An analogue of Kida's formula for the p-adic L-functions of modular elliptic curves
    J. Number Theory 84 (2000), 80-92.
    MR 1782263 (2001g:11085) / Zbl 0970.11021
Preprints Theses
On Kida's formula in Iwasawa Theory for elliptic curves
master's thesis (in Japanese), University of Tokyo, 1997
Finite Λ-submodules of Selmer groups of abelian varieties over cyclotomic Zp-extensions
doctor's thesis, University of Tokyo, 2000
Some articles
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