Mass-a Tidbits #5 - he sang these, but did he make and compose them?

 Most of the time, Yamamoto sensei had composed hundreds of original songs, anime BGM and image songs. However, two tracks were sung by Yamamoto but weren't composed and written by him...

Surprisingly, both songs were released in 1991, so it's just a one-time occurrence.

First off, every gamer should know Namco. Namco was the maker of Pac-Man, Tekken, Galaxian and Taiko no Tatsujin. A very obscure Japanese exclusive arcade game Namco made was Pistol Daimyo no Bouken (The Adventure of Pistol Daimyo) in October 1990. If one manages to finish the game, an ending cutscene plays an ondo sounding song with karaoke lyrics onscreen. When that song was recorded for the Namco Video Game Graffiti CD series, it turned into a kazoeuta or a counting song.

It's crazier when you realize Shinji Hosoe was the composer of Hinawamaru Kazoeuta, who's best well known for his music in the Tekken franchise. New lyrics were written probably by the staff(?), and of course, Yamamoto's Hitori Crazy chorus group join in. The arranger? That's not Yamamoto.

Another 1991 release only sung by Yamamoto is a duet with the late voice actress Hiromi Tsuru. Written by enka songwriter Chiaki Ogasawara, Hagure Oyakodori was made as an image song for the Silent Möbius series. This was five years before Yamamoto made an enka album that, unfortunately for me, blows like hell.

The arranger? Anime composer Fumitaka Anzai, known for his music in the original Urusei Yatsura anime.

I would be shocked if either Yamamoto regretted recording those songs or haven't heard of Pistol Daimyo nor Silent Möbius ever...