The main character of the series, Hikaru was in Primary Six, when he accidentally found an ancient Go board in his grandfather's storage room. He was able to see the blood stain on the board, which apparently no one else can see it. Before he realised it, he was possesed by a ghost named Fujiwarano Sai.

Before meeting Sai, Hikaru had no interest at Go. (He even said that it is boring ^^) Sai was begging Hikaru to let him play Go. At first, Hikaru refused, until he was vomitting so badly, because of Sai's "extreme" despair of not being able to play Go. Hikaru was left with no choice but to let Sai play Go.

After many incidents, Hikaru himself developed the love towards Go. With the determination to defeat Touya Akira, Hikaru joined the new world, The Go's world, where his destiny awaits....

Personality

Hikaru is just like typical teenage boy. He hated school works, good in sport, love reading manga and play games. Hikaru often spits out secrets too quickly, which gets him to trouble many times. Of course Hikaru sometimes made mistakes, but mostly because of his ignorance, possibly due to his young age. Overall he is a nice boy ^^