Board Thread:General Discussion/@comment-6901880-20130304064503/@comment-4957813-20130307000031

Isshin stated that Ichigo wasn't a Shinigami. Because, when Ichigo was conceived, Isshin didn't have his powers at the time, so Isshin couldn't pass on any Shinigami powers to Ichigo. Ichigo's mother was a human, which makes Ichigo human. However, since Masaki was also a Quincy, Ichigo is also considered to be half-Quincy