Kabu no Isaki (カブのイサキ Kabu no Isaki?), literally Isaki of the Cub, is a Japanese manga by 2007 Seiun Award winner Hitoshi Ashinano (芦奈野ひとし Ashinano Hitoshi?). It first appeared in 2007 as a one-shot, but due to its popularity, has subsequently become a semi-regular feature in Kodansha's Afternoon manga anthology magazine. A second volume was released in October 2009.
Isaki of the Cub shares many characteristic hallmarks of Ashinano's style: fascination with aeronautical themes; a setting in the future; a setting on and around the Miura peninsula; a vision of Japan that is isolated and nostalgic; and a natural world full of mystery that the protagonists explore with a sense of wonder. As such there are many parallels with Ashinano's previous work Yokohama Kaidashi Kikō.
Isaki (イサキ?) is a young airplane pilot who flies a Piper Super Cub. The Cub is owned by the beautiful Shiro (シロ?), and Isaki often flies errands for her as a way to pay for his use of the plane. Shiro's younger sister Kajika (カジカ?) is also capable of flying the plane and occasionally accompanies Isaki on his journeys.
The story is notable for distortions in the scale of the world, which is ten times bigger than normal. This number is both explicitly mentioned, and is also depicted by geographical features that exist in reality being ten times larger in the story. Certain other features of the world are also gigantic, such as the Tokyo Tower which is described as 3333 meters tall (ten times larger than in real life). There are also plants which gigantic, up to roughly 100 times larger than normal, although most are normal-sized. As is typical with Ashinano's stories, no explanations are given for the distortions, so the reader is left to wonder along with the characters.