| Tadahisa Maruyama | |
|---|---|
| Native name | 丸山忠久 |
| Born | September 5, 1970 |
| Hometown | Kisarazu |
| Career | |
| Achieved professional status | April 1, 1990 (aged 19) |
| Badge Number | 194 |
| Rank | 9-dan |
| Teacher | Yūji Sase (Honorary 9-dan) |
| Major titles won | 3 |
| Tournaments won | 13 |
| Meijin class | B2 |
| Ryūō class | 1 |
| Websites | |
| JSA profile page | |
Tadahisa Maruyama (丸山 忠久, Maruyama Tadahisa, born September 5, 1970) is a Japanese professional shogi player ranked 9-dan. He is a former Meijin and Kiō title holder.[1]