Yup, looks good to me. Typo is my best guess.
Disc 5 credits clearly don't need kanji verification, but I'm going to run through 'em because I noticed a bunch of potential/definite typos and minor variations.
- Masayoshi Terakawa -> Masaoki Terakawa? (discs 1~4)
(don't think 正興 is readable as "Masayoshi" so that'd be a bad typo)
- Kenzi Takamizu -> Kenji Takamizu (disc 4)
- Sadazi Mihata -> Teiji Mihata (disc 4)
- Kenzi Shiraishi -> Kenji Shiraishi (disc 4)
- Sadako Koshino -> Teiko Koshino (disc 4)
- Nozumu Nakaya -> Nozomi/Nozomu Nakatani (中谷 望)?
(I've seen 望 read both ways, but "Nozomi" apparently performed on a few albums here.)
- Masaichi Ishibashi -> Masakazu Ishibashi (disc 4)
- Masaru Nakaya -> Masaru Nakatani (中谷 勝)?
(MPN gives the reading as Masaru Nakatani)
- Humio Shirayama -> Fumio Shirayama
- Shumio Okada -> Sumio Okada (discs 1~4)
- Jun Hiiro -> Jun-ichi Hiiro (日色 純一)???
(this name just rang a bell; he performed on GSM Imagineer 1)