[Sold out] Keiichiro Hirano/Thumb Pen Refill

We sell replacement ink cartridges for the "Thumb Pen," a reading companion item invented by Keiichiro Hirano.

If you are purchasing in a store, please search for "Pilot Birdy Switch Ballpoint Pen Refill Fine 0.7mm Black BTRF-8F."

★ What is Thumbpen?
Even when you're on the move and it's difficult to take out a pen, you can draw lines and take notes just by putting it on your thumb. The "Thumb Pen" is a reading companion that can also be used as a bookmark. It was invented by Keiichiro Hirano in 2014 and was finally commercialized in 2021!

Thumb pens are sold on this page .

Delivery period: From December 24th onwards

[Notes]
*Please note that if you purchase a pre-order item together with other items, they will be shipped together, so delivery may be delayed.

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