[CHz]

I think the "Teshigawara" (勅使河原) here is Konami sound designer Tetsushi Takahashi (高橋哲史), based on some credits on Konami pages:

• Teshigawara: sound effects on Curse of Darkness: http://www.konami.jp/gs/game/dracula...ts/051005.html.
  Takahashi: only person credited with SFX in the game: http://www.mobygames.com/game/ps2/ca...rkness/credits. (CoD credits may be incomplete though, as that Konami page says Nazuki Matsushita was a sound programmer.)
• Teshigawara: sound on Neo Contra: http://www.konami.jp/gs/game/neocont...fs_com_02.html.
  Takahashi: sound design director: http://www.mobygames.com/game/ps2/neo-contra/credits.
• Teshigawara: SFX and voice on Lament of Innocence: http://www.konami.jp/gs/game/CV21/pr...ecial/s_2.html.
  Takahashi: only person credited with SFX in the game: http://www.mobygames.com/game/ps2/ca...ocence/credits.

Both Tetsushi Takahashi and "Teshiga-wara" are credited in Portrait of Ruin, though: Takahashi as the sound director and Teshigawara for SFX. (I'm sure one or both of them is the "T" credited on the OST.)