I don't know how trustful is bangumi.tv, but there could be some interesting information.
They have photo of Masatoshi Moriwaki from this site (
https://www.soremo.jp/masatoshimoriwaki) added to profile of Mamoru Mori.
https://bangumi.tv/person/22568
Would be interesting to know if Mori could be alias of Moriwaki or vice versa.