Rydeen

The device

Track from the album Solid State Survivor (Alfa Records, 25 September 1979), track 3 of side A. Duration: 4’41”. Composed by Yukihiro Takahashi. Arranged collectively by Yellow Magic Orchestra (Hosono, Sakamoto, Takahashi). Produced by Haruomi Hosono.

The title comes from a sumo manga (Raiden), name of a legendary wrestler character — Takahashi phonetises it as Rydeen for the international release. The song has no thematic connection to sumo: the title is an image, a sonority, not a programme. What matters is the track itself.

Track structure

Rydeen follows a relatively simple A-B-A’ structure, contributing to its accessibility:

1. 0’00–0’12 — Introduction. The sequencer riff establishes itself immediately, without build-up: ascending 4-note melody over a programmed snare. No progressive rise — the track is already there, at full speed.
2. 0’12–1’30 — Section A (main). Hosono’s synthetic bass enters — pulsed bass line, regular, anchoring the melodic riff. Sakamoto’s keyboards add counter-melodies. Strict 4/4 rhythmic structure, BPM around 130.
3. 1’30–2’30 — Section B (bridge). The main riff partially recedes. Takahashi programmes a rhythmic variation. Sakamoto takes the main vocal line (voices are rare in YMO, even more in Solid State Survivor). The texture slightly densifies.
4. 2’30–4’41 — Return and development. Section A returns, slightly developed. Synthesiser variations are progressively added. The track does not climax in the traditional sense — it maintains its energy level constantly until the final fade.

The process — the loop as energy

Rydeen operates on a principle radically different from the Western pop of 1979: where a pop song builds narrative tension towards a climactic chorus (verse → chorus → bridge → peak chorus), Rydeen starts directly at its maximum energy level and maintains it. No narrative tension — a pulse.

The Roland MC-8 Microcomposer sequencer (first sequencer of this type used in commercial production in Japan) plays a central role: it programmes the opening riff and maintains the metronomic regularity of the track. A human musician would play with slight tempo variations, slight expressive emphases. The sequencer cannot — and this is precisely what gives Rydeen its most distinctive characteristic: mechanical regularity as aesthetic, not as defect.

Hosono’s bass is the critical element. It is synthetic (no acoustic bass), pulsed on the quarter note, fundamentally regular — but with a slight variation of timbre across sections that gives the track its sense of space. The Hosono bass is not decorative: it is structural. Without it, the Takahashi riff would float in a void.

The arrangement

Instrumentation identifiable by listening (album credits + documented musicology):

• Roland MC-8 Microcomposer sequencer: main riff (Takahashi)
• Synthetic bass: likely Prophet-5 or Minimoog (Hosono)
• Keyboards and synthesisers: Moog, Roland SH-2 or equivalent (Sakamoto)
• Drum machine: Roland CR-78 or TR-808 (Takahashi)
• Lead voice: Ryuichi Sakamoto (bridge section only)

No guitar, no acoustic bass, no real drum kit. Rydeen is entirely synthetic — still relatively rare in 1979 for a commercially successful album. The sound is dense but never cluttered: each instrument has its place in the frequency space, which is a signature of Hosono’s production (space, clarity, each sound distinctly audible).

Lineage and resonances

Upstream: Kraftwerk (Autobahn, 1974; Trans-Europe Express, 1977) — the synthetic loop as primary musical structure, the machine as aesthetic; Giorgio Moroder (I Feel Love with Donna Summer, 1977) — the sequenced synthesiser at high speed as motor of dance energy. YMO knows and cites both influences.

Downstream: Afrika Bambaataa listens to Solid State Survivor in 1980-81 and draws from it the grammar of Planet Rock (1982) — the synthetic riff as central element, the drum machine as main percussion, no guitar. Rydeen is sampled by J Dilla (American hip-hop producer) in the 1990s–2000s. It is covered by Marilyn Manson (Tainted Love, B-side, 2001). NHK (Japanese public television) has used it as a musical theme in sports broadcasts since the 1980s — making it probably the most widely heard Japanese music in the world without the mainstream public knowing it comes from YMO.

Reading in light of the permanents

Permanent 1 — Traversal of genres as method: Rydeen is the most visible moment of the YMO traversal — the track that best embodies what Hosono, Sakamoto and Takahashi built together. Hosono did not compose Rydeen (that was Takahashi), but he produced it and plays bass on it. His role in this track is exactly what the first permanent describes: he enters the territory (Takahashi’s techno-pop), grasps its grammar, and makes it exist at its highest level. Production-as-traversal.

Permanent 2 — Production as second voice: Rydeen is a perfect example of the second permanent in collective mode. Hosono as YMO producer decides where each instrument sits in the sonic space, structures the dynamic of the track, chooses the synthesiser timbres. The bass he plays and the production he delivers are two simultaneous voices — and both are inseparable from the track as we hear it.

Critique + listening — structure and instrumentation described by listening and confirmed by album credits (producer: Haruomi Hosono; composer: Yukihiro Takahashi); Roland MC-8 sequencer documented in YMO musicology (Peter Barakan, NHK; Ian Martin, Japan Times); Afrika Bambaataa / Kraftwerk / Moroder lineages established by academic musicology; Marilyn Manson cover and NHK usage factual.