Tsukushashima
Japanese Buddhism has aspects of deriving from the main stream (India) (there are teachings that have changed, there are teachings that have not been transmitted), but I have been taught the teachings of Shakyamuni, which is based on Buddhist scriptures, and Buddhism is Buddhism.
However, since the Buddhist scriptures themselves are the direct and correct teachings of Shakyamuni in the first place, there are also Buddhist scriptures written by India and China quite a bit later, various theories have arisen about what Shakyamuni's teachings really are, and this also leads to differences in doctrine and purpose.
Of course, there are also things that are based on common truth and logic, and in particular, the Four Holy Declarations and the Four Dharma Signs are of course important common teachings in Buddhism.
Also, the main source of criticism that Japanese Buddhism is not Buddhism and that it is funerary Buddhism (where the teachings have become obsolete) is that there are no monks who have officially received the precepts, the biggest bottleneck. First of all, there is no formal Kaidan. (Japanese monks are granted monk registration to those who meet the regulations of each denomination. (Those regulations are also scattered) Also, it is also due to the hereditary system, and there are also few cases where people have serious aspirations and become monks.
Of course, the qualifications of a monk and the qualifications as a funeral mentor are undeniable, since it is undeniable that there are places that are far from the required original image, criticism has arisen, which in turn may lead to distrust of Buddhism, etc.
Well, however, in Buddhism in any country, whether it is the Terawada countries, Tibet, China, or South Korea, they all have similar problems, big or small. That's why it's not just Japan.
Japanese monks are just too busy with a lot of things, including common affairs. It's not an environment for quiet spiritual practice and training, is it?
Kawaguchi Hidetoshi Gassho