Quick answer — Takeshi Watanabe worked on The Duke of Death and His Maid Season 3 (Music), Pseudo Harem (Music), The Duke of Death and His Maid Season 2 (Music) and 16 more anime.
Takeshi Watanabe worked on The Duke of Death and His Maid Season 3 (Music), Pseudo Harem (Music), The Duke of Death and His Maid Season 2 (Music), Strawberry Marshmallow (Music), Strawberry Marshmallow OVA (Music), The Duke of Death and His Maid (Music), Saki: The Nationals (Music), To Love Ru Darkness 2 Specials (Music) and 11 more.