 If you liked
Hikaru no Go
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 ...then you might like
Katana Series
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Katana and Hiraku no Go are similar because a boy can see the spirit attached to an certain object and therefore gets interested in things to do with the object.
Hiraku no Go is about a boy that meets a spirit attached to a Go board, and gets interested in Go.
Katana is about a boy that can see the spirit of any Katana and gets interested in katana's.
Both have a certain educational level for you can learn a lot about some aspects of Japanese culture.