For writers who have done Westerners the service of exploring, interpreting, and explicating haiku and the Zen practice that leads to the haiku moment, I suggest Jane Hirshfield, Robert Aitken, William Higginson, Penny Harter, Hasegawa Kai, Earl Miner, Richard Wright, Gary Snyder.

Haiku impressions Ann E. Michaels recommendations for Westerners on haiku