Japanese Literature

Just got my book list for a Japanese Lit class.

Riichi Yokomitsu - Shanghai
Natsume Soseki - Kusamakura
Haruki Murakami - Hard Boiled Wonderland & End of the World Chushingura (Donald Keene translation)
Fumiko Enchi - Masks
Tatsuzo Ishikawa - Soldiers Alive

anyone read these? any i should be excited for / worried about?

Since this thread is already on the topic, what are the top 3 books I should read to be introduced to Japanese literature? No Murakami please, I've already read quite a bit of him.