The Tōkai Kisen company operates Jet Ferry cruises towards the Izu Islands aboard hydrofoils. The main advantage of the hydrofoil (besides its speed) is that it is little affected by waves, making it ideal for those with seasickness.
Here is one if their hydrofoils, the Seven Islands Niji (Rainbow), painted by a well known Japanese illustrator, Ryohei Yanagihara.
Travel tip: In Tokyo, the Jet Ferry departs from the Takeshiba pier and a cruise to Izu Ōshima costs about ¥7400. It is quite expensive, but think about it as a water version of a Shinkansen: while the Jet Ferry travels from Tokyo to Ōshima in 1 hour and 45 minutes, the same trip with a large passenger ship will take about 8 hours...
EXIF info:
Nikon D90
Lens: VR 18-55mm F/3.5-5.6G
Focal Length: 48mm
Aperture: F/5.6
Shutter Speed: 1/1200s
ISO Sensitivity: ISO 200