Heaven's Door (KOIKE Keiichi) summary: A compilation of short stories by Keiichi Koike. 1. Knockin' on Heaven's Door 2. 3000 Leagues Searching For Mother 3. Lazaro Franco's Fourth Hour 4. The Fallen Samurai And The Sea 5. Loopa 6. Kenbo's Diary 7. Sponge Generation 8. By Plane 9. Horizon 10. Landed An astronaut sent on a space mission promises his wife and child that he will come back to them.