![[Sold out] Keiichiro Hirano/Thumb Pen Refill](http://corkstore.jp/cdn/shop/products/3b3eed20dc185e8155aa1ae48ec768e4_{width}x.jpg?v=1639467086)
![[Sold out] Keiichiro Hirano/Thumb Pen Refill](http://corkstore.jp/cdn/shop/products/3b3eed20dc185e8155aa1ae48ec768e4_530x@2x.jpg?v=1639467086)
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.