| Last Inning | |
| Ja Kanji: | ラストイニング |
| Ja Romaji: | Rasutoiningu |
| Genre: | Sports |
| Type: | manga |
| Author: | Ryu Kamio |
| Publisher: | Shogakukan |
| Demographic: | Seinen |
| Magazine: | Big Comic Spirits |
| First: | 2004 |
| Last: | 2014 |
| Volumes: | 44 |
is a baseball manga written by Ryu Kamio, supervised by Kiyosi Kato and illustrated by Yu Nakahara.
Saitama High School went to the first round of the Koshien 36 years ago. However, after that they did not manage to win any. Keisuke Hatogaya one of the members of the team 23 years after going to the Koshien punched the Umpire for making an unfair call because he was trying to make high school baseball like he wanted. 13 years later Keisuke is a sly and successful businessman. After making a big sale he got promoted but within moments of getting promoted he was placed under arrest for disobeying pharmaceutical laws. He was arrested because he was placed in charge to be framed by the boss. After spending some time in jail he gets a visitor who turned out to be the coach of the baseball team he was in 13 years ago. The coach was then the principal of Saitama High School. He offered to pay for Keisuke's bail if he became a coach for the Saitama baseball team. Keisuke resented it for a little but then eventually gave in. The baseball team was completely average. Keisuke began to train them until a woman came by and told them that the baseball club was shut down at that school for it did not have any value. However Keisuke obtained an extension on the fall of the club saying that he didn't get the team to Koshien next summer that it would be disbanded. Now with almost a whole year to train the students Keisuke works hard to train these students in his odd but effective methods so that they may reach the Koshien.
Volume 21 reached the 25th place on the weekly Japanese manga charts, with 29,846 copies;[1] volume 22 reached the 28th place, with 22,763 copies;[2] volume 28 reached the 30th place, with 37,129 copies;[3] volume 32 reached the 18th place, with 32,591 copies;[4] volume 35 reached the 32nd place, with 29,893 copies;[5] volume 36 reached the 18th place, with 27,367 copies;[6] volume 37 reached the 50th place, with 30,915 copies;[7] volume 39 reached the 47 place, with 26,791 copies;[8] volume 40 reached the 34th place, with 25,312 copies;[9] volume 44 reached the 28th place, with 25,045 copies.[10]