However, it is still controversial as to whether the doctrines and rites of Tachikawa School mentioned above were true or not because the above theories are all based on documents written by those who regarded Tachikawa School as a heresy and oppressed it, and most of the documents written by devotees of Tachikawa School, which are vital for verification of the genuineness of those theories, were subjected to book burning and Tachikawa School was treated as a heresy against the backdrop of its involvement in the political power struggle between the Southern and Northern Dynasties.
しかしこれは、すべて立川流を邪教視して弾圧した側の文献に依るもので、肝心の立川流の文献はほぼ焚書扱いになっており、また南朝側と北朝側の政治背景から権力闘争に巻き込まれ邪教扱いされたという背景もあるため、それらの教義や儀式などが事実であったかどうかは現在でも議論されるところとなっている。