Apple is taking a very long time to refresh the Apple Pay Japan page with new iPhone related Apple Pay information. It may be a long shot but we could see some minor NFC related announcements later this morning after Japanese companies open for business: NFC Passes, NFC Reward Cards, etc.
The iOS 12 golden master lists the new Contactless Student ID Card feature in Japanese but Student ID Cards are only for America at this point.
Apple has still not updated any of the Apple Pay or related support page information yet and may be until the iOS 12 launch before we see anything.
There is much much more: Welcome the new era of A12 Bionic NFC and iOS 12