The US CAV disc (1130-84) have been pointed out to include the updated fanfare, that's why Belbucus had to patch it from another source as Mallwalker said.

Your Japanese copy (PILF-1236) seems to have the same issue but you say that you have patched the original fanfare from the US CAV disc (1130-84), hence the confusion.

The only explanation I can think of is what I tried to describe here: http://originaltrilogy.com/forum/topic.cfm/Digital-Source-for-the-77-Stereo-Mix/post/581659/#TopicPost581659

Different fanfare on different pressings of the (1130-84).