Japanese two female singer-songwriters, Kazumi Nikaido(also known as Nika Soup) and Saya Source(of Tenniscoats, Mher Shalal Hash Baz). Nika is known for her chameleon-like ability to transform her voice, while Saya has a melancholic and straightforward singing style. Both have distinct voices that can be identified immediately, but when they sing in unison, they create melodies that are truly sublime. They have released charming album IPIYA(2005) features playful pop songs reminiscent of nursery rhymes, repetitive mantra-like tracks. The two went back and forth from their homes in Hiroshima and Tokyo to create beautifully diverse songs for this record. This is the documentary of "how" and "why" and also "where" they had made the very original music. Many interviews, rehearsals, free sessions, live performances are included. There is a childlike innocence to this documentary, and offers a peak into the unique world of how they make music. In the summer of 2009, Hiroshima based songwriter Nikaido Kazumi and Tokyo's Saya (Tenniscoats) met at Guggenheim house, in Shioya. Overlooking the bay of Kansai, the pair set about recording a collection of songs that capture moments of utterly euphoric song - housed in a shimmer of incidental soundscapes. Recording both inside and outside Guggenheim House, the pair's songs find a perfect union with the architectural and urban spaces in which they were situated. 'Yuka' and 'Osiro' for example allow the epic high ceilinged rooms of Guggenheim House to shroud Nikasaya's voices in astounding natural reverbs, whilst 'Ufun Taxi' features percussive textures care of passing trains and 'Buun' an unexpected duet with an over excited Semi (cicada). One Summerheim melds free-pop structures with elegantly intertwined vocal harmonies. Building on the unique songform found on the duets debut 'Ipiya', One Summerhiem sees two of Japanese preeminent and visionary voices re-united. Nikasaya's songs are more than the sum of their parts - they soar in a glorious cluster of swirling vocal melodies and instrumental flows that are harmonic, hummable and most of all heartwarming. One Summerhiem also features contributions from Ueno (Tenniscoats), Lawrence English and Meco.