Research Tools developed by Takeshi Nakagawa


The tools on this page are spin-offs from several scientific drilling projects, including 'Suigetsu Varves 2006' (, 'Suigetsu Varves 2014', and 'Comparative Studies on Ancient American Civilizations' ( If you want to purchase any of the products, or for any other questions, please contact Takeshi Nakagawa by Email (nakag(at)

Computer programs developed by Takeshi are here.

*This new product replaces previous PolyCounter special keyboard (jpg) produced by Keytec.

Note: If you are desperate, you can buy 19 mm plastic LL-channel from us, which is specifically designed to be used with three-sided cubes (see below). However, you can find aluminum or plastic L-angles in a wide range of sizes either online or from your nearest hardware store. FYI, the formats thaw we often use include 12 x 12 x 1 mm, 15 x 15 x 1 mm, and 20 x 20 x 1 mm.


(Under construction)

For further information and sales inquiries, contact the author:
Professor Takeshi Nakagawa
Research Centre for Palaeoclimatology, Ritsumeikan University
1-1-1 Noji-higashi, Kusatsu, Shiga 525-8577 JAPAN
Last updated: 30 Nov., 2019.