I believe that you know quite a bit about go history in China, Korea, and Japan. You also have shared a great deal with others, which is commendable.John Fairbairn wrote: I more or less agree, and I certainly sympathise if you feel China's contributions have been overlooked. I think you will find it hard to find many people in the West who have dome as much as me to highlight Chinese history. My efforts have won recognition within China. General Lin Jianchao has called me a "Friend of China."
I am very happy to be thought of that way. But I also write extensively about go in Japan and Korea. I therefore think of myself also as a Friend of Japan and a Friend of Korea.
However, it is natural that you don't have equal expertise in the culture of all three countries. Even to natives of China, Korea, and Japan, there are disagreements regarding historical events that happened not too long ago, and it is impossible to have an opinion on those events without having some degree of bias - eg., you have to decide what facts you believe to be true. Many things are controversial, and it impossible to ascertain the truth with certainty about what happened.
The same is true even considering current events in the West today. Folks on every side of the political spectrum decry "fake news" regarding events that the individual has no way of absolutely knowing.
I don't mean this to suggest that any single individual on this forum is biased. Rather, I want to express that all historians and people who write about historical and even current events carry some degree of bias.
We can do our best to learn as much as we can, but our life experiences combined with the particular balance of materials we have researched necessarily leave us with some degree of bias (myself included).