Tatsuya Yoshida (吉田達也, Yoshida Tatsuya) (born 9 January 1961) is a Japanese musician, drummer and composer who is the only consistent member of the renowned progressive rock duo Ruins, as well as of Koenji Hyakkei. He is also a member of the progressive rock trios Korekyojinn and Daimonji. Outside his own groups, Yoshida is renowned for his tenure as drummer in the indie progressive group YBO2, a band also featuring guitarist KK Null, whom he also joins in the current line-up of Zeni Geva and he has played drums in a late edition of Samla Mammas Manna. Since 2001, he and bass guitarist Takeharu Hayakawa have worked with jazz pianist Satoko Fujii and trumpeter Natsuki Tamura in the Satoko Fujii Quartet. He has been cited as "[the] indisputable master drummer of the Japanese underground".

Along with his participation in bands, he has also released several solo recordings.

With Ruins

With Koenji Hyakkei

With Painkiller

With Ron Anderson

With The Gerogerigegege

With Satoko Fujii Quartet