Thank you for visiting my English Homepage.
My Japanese Homepage is very huge (more than 4,000 files, 40MB), and very famous among computer scientists and puzzle lovers in Japan. Total hit count from the opening(Aug/30/1995) exceeded 100,000,000.

Puzzle Generator Japan (New Site! -- My Job)
http://puzzle.gr.jp/show/English/
World Fastest Problem Generator

Automatic Puzzle Generator: Number Place(Sudoku)
generating 1 question in 0.05 seconds
Automatic Number Place (Sudoku) Problem Generator Version 2.0
makes you possible to create 17-clue problems!

You will be able to enjoy Number Place Problem Generator on Nintendo DS soon.
The product name is "MUGEN (infinity)" searched by Google.
Our problem generator engine is installed in this product!

Puzzle Generator	Number Place Java Open Source Program Creating problems yourself with this generator! Automatic Number Place Generator V2.0.1 (Dec 21, 2007) 100 18-clue problems 20 clues problems Let's Make Number Place -- Elementary course Moved Press Conference on September 6 at Akihabara

Java and Puzzle World

I want to know the history and origin of each puzzle.
Who invented thepuzzles, when, where, etc.
Are there any useful homepages on the WWW?

       

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Origami(Paper Folding)

How to fold (YouTube)
How to make Crane Base
How to make Crane

Origami Professor, University of Tsukuba

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Japanese Culture Links

CDJapan(japanese music, japanese anime,... )
Karakuri Creation Group
Japan Toy Museum

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my photo

my book
the Hidden Realities of
Computer Industry in Japan

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Please send any feedback to .
This page is link free.