It'll have a 230mm CRT - most Japanese (Hitachi/Matsushita/Toshiba/NEC) follow the same basing as their JEDEC (US) counterparts for their monochrome tubes.
Sphere Research has a Toshiba CRT manual hosted on their site:
http://www.sphere.bc.ca/test/crts/to...rt-catalog.pdf
It has has a 230mm (9") monochrome CRT shown with pinout E7-91 / 7GR (the standard for 7 pin BW tubes):
Filaments 3/4
Cathode 2
G1 pin 5 or 1 (interconnected on some tubes, but not all)
Hope this helps
Cheers,