- Year: 1998
- Platform: SEGA Saturn
- Publisher: SETA Corporation
- Theme: Anime / Manga
Real Mahjong Adventure: Umi e Summer Waltz (aka リアル麻雀アドベンチャー 海へ Summer Waltz) is a video game published in 1998 on SEGA Saturn by SETA Corporation. It’s an adventure game, set in an anime / manga and visual novel themes.