Inspired by the growth rings of trees, Masahiro Minami has designed a leather pencil case named LOG that, well, looks exactly like a log. The inside is hollow and a hatch flips open, allowing you to store pencils, pens and other small stationary.

It was manufactured by Heath Japan and depending on the size, will retail for between 7,100 yen and 7,600 yen. That feels like a lot for a pencil case. But apparently the leather rings are very hard to make.

First it was tukkun and then den-den. This period of Minami-san’s life will likely be referred to by historians as his “round period.”