How can I get to the Ogasawara Islands?

To visit the Ogasawara Islands, you need to take the liner ship "Ogasawaramaru" departing from Takeshiba Pier, down town Tokyo. It takes about 24hours. There are no other options excluding few luxury cruises making stops by the island usually for a single night irregularly around the year. There are no airports, so if you want to explore Ogasawara deeply, taking the "Ogasawaramaru" is the way to go.