Dance preview: Sankai Juku: Kinkan Shonen/Toki, London

This pretty brief but concentrated season from Japan's most famous butoh company contains two full-length, sharply contrasting productions. Kinkan Shonen, or Kumquat Seed, is the most traditional of the two. Premiered in 1978 and recreated in 2005, it explores the dream life of a young boy haunted by images of death. Sankai Juku's all-male cast deploy their most extreme shape-changing skills as their bodies metamorphose through a series of eerily inhuman supernatural forms. In one of the company's newest pieces, Toki, or Time, the transforming powers of the dancers' bodies are layered with the imagery of science fiction in a work that shuttles between the culture of ancient Japanese mysticism and futuristic fantasy. Both are choreographed by founder director Ushio Amagatsu.