I understand that Japanese booking philosophy was very nativist with the general archetype being to bring in foreigners from all over the world to face the major stars of the promotion and that had been the booking philosophy dating back to Rikidozan. My understanding is that changed in All Japan with Riki Choshu invasion in 1985, which was the first native vs native feud in that promotion and due to the success of Choshu invasion angle: Jumbo vs Tenryu was born and the rest was history.
So my questions are the following:
1. Were there ever any major native vs native matches in All Japan pre-Choshu? I am pretty sure the answer is no, but I just wanted to check.
The one I am more curious about is New Japan.
2. Inoki ran some round robin tournaments in the mid-70s which required him to face Masa Saito and Seji Sakaguchi, which look like the first ever main event native vs main event native matches in puroresu history? Is the 1974 World League the first of its kind?
3. It seems like Umanosuke Ueda is the first ever Japanese heel. He regularly teamed with Tiger Jeet Singh and wrestled Inoki regularly in the late 70s. Is he the first of his kind? Is Inoki vs Ueda the first native vs native feud in puroresu history?