Quick answer — Yoshinobu Yamakawa worked on Little Busters! Refrain (Director), The Duke of Death and His Maid Season 3 (Director), Hi Score Girl: Extra Stage (Director) and 12 more anime.
Yoshinobu Yamakawa worked on Little Busters! Refrain (Director), The Duke of Death and His Maid Season 3 (Director), Hi Score Girl: Extra Stage (Director), Hi Score Girl II (Director), The Duke of Death and His Maid Season 2 (Director), Hi Score Girl (Director), Little Busters!: EX (Director), The Duke of Death and His Maid (Director) and 7 more.