This is the only one of these movies that isn't a joint project with Hokuto no Gun. It's a digital remaster of an old school LaserDisc to S-VHS fansub done by Club A-Type. This was the first GeGeGe no Kitaro anime to be fan subtitled.
Shuichi Yamada, the villain of the original version, has a cameo at 30:48.
GeGeGe no Kitaro movie #07 (1997) - The Giant Sea Monster [Club A-Type - TSHS] (1080p) [EB343B2D].mkv (4.9 GiB)