The Sword of Kuromori (The Kuromori Trilogy #1)

Kenny Blackwood arrives in Tokyo to spend the summer with his father and is stunned to discover a destiny he had never dreamed of when he finds himself in the middle of a hidden war that is about to explode.
Racing against an impossible deadline, Kenny must find the fabled Sword of Heaven and use it to prevent the disaster. But a host of terrifying monsters is out to destroy him, and success will come at a price.
With clever, fearless, sarcastic Kiyomi at his side, Kenny must negotiate the worlds of modern and mythic Japan to find the lost sword, before it's too late.

Aventura / Fantasia