Collection: Pen tip adjuster

Yoshito Nakatani

Joined Diamond Co., Ltd. in 2001.
He worked in sales at department stores and other retail outlets before moving into pen nib adjustment.
He then trained at an Italian brand and became a pen doctor specializing in Diamond Co., Ltd.
Currently, we hold pen clinics all over Japan and also inspect fountain pens.

Kazuyuki Doi

After working at a stationery store for seven years, he joined Diamond Co., Ltd. in 2016.
He trained under Pen Doctor Nakatani and made his debut as a pen doctor in 2024. While inspecting fountain pens, he also works with Nakatani in pen clinics across the country.