>>13282720Inoki's son was at the show in which they started using it and officially endorsed Nakajima using the Toukan Style catchphrase on his robe.
But that would kind of explain why on the AJPW show of the 27th Nakajima came out in a white Snoopy bathrobe and his old trunks and not the Toukan Style themed robe and trunks. No one must have told him about the letter until it was too late and he had to rush to find something to wear at the last second.