Traveling to Japan probably takes the transportation line from Hokkaido to Tokyo to Osaka Kyoto. Is JR PASS cost-effective?

Not bad, the minimum 7-day file of jrpass is about 1800 RMB for an adult. It is not convenient to take JR from Tokyo to Hakone-CHO, and it is the most convenient to take Oda Express, but Oda Express cannot use jrpass because it is not operated by the same company. However, only counting the round trip from Tokyo to Osaka, Osaka to Kyoto, and then from Osaka to Tokyo, this trip basically costs 2000+ RMB, plus you don't have to spend money to take the jr route between Osaka and Tokyo by jrpass. Overall, it is still relatively valuable. There is also the use of jrpass. You can't take the fastest Shinkansen, Hope, but you can only take the light rail, but as far as the Tokaido Shinkansen from Tokyo to Osaka is concerned, it is not much slower than Hope.