The Osaka Castle is a famous historical fortress in Osaka.
Dotonbori is a popular dining and entertainment district in Osaka.
"Tokyo (Tokyo and Shinagawa Stations) and Osaka (Shin-Osaka Station) are connected with each other by the JR Tokaido Shinkansen. Nozomi trains require about 155 minutes to reach Shin-Osaka Station from Tokyo, Hikari trains about three hours and Kodama trains about four hours. The regular one way fare is 13,870 yen by non-reserved seat or around 14,500 yen by reserved seat. A 7-day Japan Rail Pass costs about the same as regular round trip tickets. The Japan Rail Pass is valid on Hikari and Kodama trains, but not on Nozomi trains. Only available to foreign passport holders, the "Shinkansen Round Trip Package" provides a round trip within seven calendar days by non-reserved seat on any train between Tokyo and Shin-Osaka for around 23,000 yen. The ticket can be purchased at JR Tokai Tours travel agencies." - JapanGuide