Co-Authorship

If the Earth was a Globe of 100cm ---SDG's version
text by Tomoya Nagai
Sekaibunka Books, August 2022, ¥1300+tax
240mmx190mm, 64p, written in Japanese
ISBN 978-4-418-22838-6 C8037

*A new version of the same title in 2002, re-edited from SDG'S point of view. The cover illustration is new, using the technique of "double one-stroke". Illustrations inside are the same, with new layout.

From where? we came and, To where? we go"
--- pocket-size version
text by Osamu Sakura
Chuokoron-Shinsha, May 2011, ¥590+tax
150mmx108mm, 188p, written in Japanese
ISBN 978-4-12-205484-4 C1195

35 phrases to start a good romance
text by Hiromi Akiyama
PHP Interface, February 2004, ¥1000+tax
170mmx130mm, 80p, written in Japanese
ISBN 978-4-569-63310-7 C0095

If the Earth was a Globe of 100cm ---Korean version
text by Tomoya Nagai
Badabooks, June 2003
240mmx182mm, 60p, written in Korean
ISBN 978-89-5561-193-5

*A Korean version of the same title (original Japanese ver. 2002)

If the Earth was a Globe of 100cm
text by Tomoya Nagai

cooperated by the National Museum of Emerging Science and Innovation
Sekaibunka Books, September 2002, ¥900+tax
194mmx134mm, 64p, written in Japanese
ISBN 978-4-418-02519-7 C0095

*If the earth is100cm in diameter, how high is the highest mountain, how deep is the deepest sea? How much drinking water do we have to share? --- A new perspective for our planet earth.
*Out of print at the publication of the new version(2022).

From where? we came and, To where? we go"
text by Osamu Sakura
Bronze Publishing, August 2000, ¥1500+tax
215mmx154mm, 144p, written in Japanese
ISBN 978-4-89309-207-3 C0095

*A book to think about the meaning of our daily life, through the evolutionary-biology point of view.
*Out of print at the publication of the pocket-size version(2011).