Hirasawa is known for his eclectic choice of instrumentation. Some of the instruments he built himself, being inspired by his background in engineering and machinery.
Guitars Hirasawa has favored guitars designed specifically by Japanese instrument manufacturers. With a movement in the early '80s of electric guitar makers moving away from mass-producing copies of foreign designs and towards original ones, Hirasawa played many unique models. Over a five-year period, from
Mandrake's last days to the early P-Model phase, he used the H.S. Anderson Rider,
Fernandes Art Wave and
ESP Random Star, painting them in bright colors (burgundy, yellow, blue and white). In 1983 he settled on
Tōkai Gakki's aluminum guitars as his main ones, attracted by their unique material and design. He used multiple Tōkai Talbos over an eleven-year period, with the guitar becoming an integral part of his image. After Tōkai discontinued production and customer support for the Talbo due to financial difficulties in the mid-'90s, Hirasawa requested Fernandes to make him a guitar of his design in 1994 called
PHOTON, a Talbo-shaped guitar with a wooden body. In 2004, he requested TALBO Secret FACTORY, a manufacturer of Talbos run by other musicians who also liked the guitar and wanted to continue to use it, to build a Talbo of his own design, called
ICE-9 (named after the
material of the same name from
Kurt Vonnegut's novel ''
Cat's Cradle''). It became Hirasawa's main guitar for the next eight years. To showcase it, he made an eponymous mini-album in 2005. Hirasawa has continued to work with the TALBO Secret FACTORY, requesting the conversion of one of his early Tōkai models into a new design of his, the
ASTRO, in 2011 and asking for the renewal of the
PHOTON with new specifications after two decades of usage. In 2012, Secret FACTORY co-founder
HISASHI gifted him a Talbo of his own design, the
EVO 0101Z, which Hirasawa adopted as his new main guitar, owning standard copies as well as two equipped with
single coil guitar pickups for selective usage. Besides those, Hirasawa has also used different types of guitar for specific purposes, playing
MIDI guitars like the Ibanez X-ING IMG-2010 and Casio MG500, various acoustic and
classical models, classic surf ones like the
Mosrite and the
Jaguar, and the Aria AS-100C/SPL
silent guitar.
Electronics Hirasawa has used
Amiga computers extensively in his work, starting out with CG production in 1987, and later on applying it on his albums and live shows, using applications such as Say,
SCALA,
Bars & Pipes,
SuperJAM! and
OctaMED. He stopped using Amigas with the
LIMBO-54 shows of 2003 and the
Byakkoya/
Paprika albums of 2006, since "maintaining an Amiga now is, like maintaining a classic car, costly". In the '90s he started a gradual transition to
Microsoft Windows (later on dabbling in
Ubuntu for a time), using programs such as Delay Lama,
Vocaloids, Bars'n'Pipes (an unofficial continuation of the Amiga program),
Cakewalk Sonar and
Synth1. When choosing string tones Hirasawa aims to find ones with unstable pitches and a "dark sound", which he finds harmonious, such as the
Mellotron,
Kurzweil synths and EASTWEST's line of Symphonic sounds.
Recording/production In the '90s, Hirasawa gradually moved his work from professional facilities to home, dubbing his workspace on various residences "Studio WIRESELF". He finally moved completely to it by the recording of 2000's ''Philosopher's Propeller''. The following year he undertook the
sustainable energy project "Hirasawa Energy Works" and changed his lifestyle so that all his music would be recorded with solar energy. To reduce carbon emission, Studio WIRESELF was outfitted to be powered completely by a
photovoltaic system of 2
solar panels, with 2 car batteries to store extra energy. Years later, Hirasawa added 2 more panels to the studio and retired the batteries. Initially Studio WIRESELF operated on large pieces of equipment, both analog and digital. With the advances of technology and the streamlining of production under Hirasawa Energy Works, the working landscape transitioned to
software synthesizers, with the physical elements of the studio reduced to one recording booth and two workstations, one for Hirasawa and the other for engineer Masanori Chinzei. ==Activism and charity==