It is fun for puzzlists not only to solve problems, but to make problems.

I am interested in various intellectual plays, such as puzzles, recreational mathematics, and other diversions. In consequence of this, since junior high school I have been a member of ARMJ, Academy of Recreational Mathematics, Japan.

Now, I have a great deal of interest in designing various puzzles, which may belong in a known type of a taxonomy, but in a case, or may not. Moreover, they are not always available even in Japan, so I disclose some of my puzzles here. I hope you to play and enjoy them.

In the following pages, there is the descirption of my puzzle separately. These information actually enables you to craft the puzzle with paper or other materials. Note that, however, the pages are prepared only for personal use, not for business use.

If you know the puzzle which is almost the same as my original one, and which was made earlier than the following date, please give me some information by e-mail.