Kokuyo is high quality paper made in Japan. 

The JIBUN_TECHO is made with KOKUYO original papers that are firm and smooth to write on. And because they’re designed to be carried around, they’re very lightweight. Having listened carefully to the needs expressed by our users, we created the JIBUN_TECHO notebook range using KOKUYO original papers we call “THIN” and “MIO.”

Kokuyo THIN Paper is a lightweight yet durable paper developed specifically for the Jibun Techo. Compared to papers such as the Tomoe River brand, it has low show-through so writing on both sides is not a problem. It resists warping even when you rub out writing with hard erasers on erasable pens.