The original name is Tokudai-ibo Shinkawa Tama-zouge
I assume this one is (retusus v major x retusu v furfuraceus f magunificus)developed by Mr. Shinkawa.
He tried to develop a retusus with very long and large tubercles.
(https://box.c.yimg.jp/res/box-s-xos677pzbgareyol3wk3lnrroi-1001?uid=c36b6602-a1d3-4cec-9a4b-90198cca6553&etag=4694267a1447720513308644)