This pure Black float has an over-sized Kita 北 stamp on its ID seal.  In fact, this ID seal is a whopping 2 1/2 inches in diameter.

I saw this float when a friend of mine visited the Hokuyo Glass Factory in Japan.  This pure black glass float was sitting in the background in some photos that they had taken inside the Hokuyo gift shop after they toured the glass factory.  I asked them about this float and they told me they could purchase it on my behalf the next time they went there.  Shortly before they left Japan they were able to make another trip back to Hokuyo and purchase this float.

It's a tank of a float.  It's very heavy for its size. 

It's all black, even the seal is black.  Light does not pass through this float.

It measures about 43 inches around the equator or about 13 2/3 inches wide.  It measures 15 inches tall.

This float was produce in 2023 by the Hokuyo Glass Factory as a special item for their gift store.