Types of tickets
It takes about 3 hours between Tokyo and Shin Osaka by the Tokaido Shinkansen "Hikari," and about 3 hours between Shin Osaka and Hakata by the Sanyo Shinkansen "Sakura." JR's Shinkansen bullet trains are convenient for long distance travel between major cities in Japan. I would like to recommend "JAPAN RAIL PASS" provided by the JR Group 6 companies for such train movement in Japan. This is a pass for foreign travelers visiting Japan for sightseeing purpose due to immigration status of short-term stay.
"JAPAN RAIL PASS" allows customers to get on the Shinkansen (except for "Nozomi" and "Mizuho") any number of times, and allows them to get on local lines, JR buses, etc. operated by JR companies. The fee for an ordinary car is 29,110 yen for 7-day use, 46,390 yen for 14 days, 59,350 yen for 21 days, and that for green car is 38,880 yen for 7-day use (as of March 2018). It is a pleasing point not to incur additional fee for the reserved seats. However, be careful that purchase can only be done before visiting Japan. After the purchase procedure at a JR designated dealer or agent in your country of residence, receive the exchange certificate. After entering Japan, exchange the exchange certificate with the JAPAN RAIL PASS ticket at the exchange offices of the main stations of JR. For exchange, it is necessary to present a short-term stay stamp/seal stamped on your passport at the time of entry, so be sure to check stamps, etc. at the time of immigration. The exchange deadline for this ticket is within three months after purchase of the exchange certificate.
To reduce the trouble of purchasing a ticket every time you ride a train, a transportation IC card that can charge a certain amount as electronic money in advance is convenient. For example, "Suica" sold in the metropolitan area is 1,000 yen (500 yen deposit + electronic money 500 yen) at multifunction ticket machines of JR East stations, JR ticket offices, etc. Charging can be done at the station's multifunction ticket vending machines, convenience stores, etc. up to 20,000 yen. There is also a registered card "My Suica," but when used for a train or bus, only the registered person can use it. Therefore, a non-registered card is recommended for travelers. Even if the names of cards are different according to the region, they can be used almost nationwide and can be used for shopping at convenience stores and station kiosks, so it is convenient to have one.
Unfortunately, in Japan, you cannot use a credit card in most cases when purchasing a ticket. Although some JR's ticket counters and ticket vending machines accept credit cards, they are not currently compatible with overseas issued credit cards. Future improvements are awaited.