The 2010 is a vintage Tombow pencil. I was lucky enough to be be able to purchase a used box a few years ago, though the box has some tears, and isn’t full.
The writing is entirely in Japanese, and beyond my comprehension. The Tombow dragonfly graphic is wonderful, rendered with great detail.
The pencils themselves are marked in silver on green:
H.O.P. “Tombow” Pencil [logo] HB = 2010 D
If anyone can shed light on the meaning of the “H.O.P.” or circled “D”, please do.
After sharpening, the pencils seem somewhat scratchy and sub-par – not like the first-rate Tombow pencils of today.