Japanese trucks make choosing rear lighting easier than it looks: cab families share standardized rear combination lamp footprints, so once you know your footprint, voltage and wiring plan, the rest is taste. Here is the whole decision, in order.

1. Start with the OEM footprint

Japanese trucks — Hino, Fuso, Isuzu, UD — mount rear combination lamps in one of two broad OEM footprints:

  • Triple-lamp footprint. Medium and heavy cabs carry the familiar wide, three-chamber lamp bar. Full-size replacement lamps around 610 mm wide are built for this space and bolt into it directly.
  • Twin-lamp / compact footprint. Light-duty trucks — the 1t–2t class, such as the Isuzu Elf or Hino Dutro — use a smaller two-chamber lamp, served by compact replacements.

OIRAN also builds to the VIGNAL-style footprint used on Volvo and some UD models — ask us before ordering if that is your truck.

2. Match the size

Measure your current lamp (width × height) and pick the class that matches:

  • Full-size (about 610 × 220 mm): KATANA (613 × 217 × 102 mm), SAMURAI L (613 × 217 × 102 mm, with light bar), ARASHI (612 × 218 × 95 mm), HAYATE (612 × 218 × 126 mm), KIRAMEKI (612 × 218 × 95 mm).
  • Mid-size: COMBO (570 × 153 × 115 mm), OTO (501 × 200 × 100 mm), ZERO (500 × 200 × 110 mm).
  • Compact: COMBO MINI and ARASHI MINI (both 395 × 160 × 90 mm), SAMURAI S (333 × 189 × 114 mm), JUNIOR (326 × 153 × 85 mm) — the JUNIOR is our 1t–2t specialist.
  • Single-unit modules: LED 46 (208 × 208 mm), KAKU (195 × 212 mm, square), LED 32 (125 × 143 mm). Modules suit custom layouts and trailers; note that some require a separate rear reflector to remain street-legal.

3. Check your voltage

Heavy Japanese trucks run 24V systems; many light-duty trucks run 12V. Full-size OIRAN lamps are generally 24V, while the JUNIOR, COMBO MINI, ARASHI MINI, SAMURAI S and LED 32 accept 12V/24V. The voltage row is on every product page — check it against your truck before anything else, because it is the one spec you cannot adapt around.

4. Decide on functions and modes

Every OIRAN rear combination lamp covers the required functions: running light, brake light, turn signal and reverse light. The differences are in behavior — sequential (dynamic) versus standard turn signals, switchable-sequential variants, side-marker animation on the SAMURAI series, and ESS (Emergency Stop Signal) compatibility. We explain all of these in plain language in Sequential LED taillights explained: ULA, SEA and ESS modes.

5. Plan the wiring before installation

Two supporting components may be required alongside the lamps:

  • A plug-in harness. OIRAN lamps install through the truck's factory connector via a plug-in harness — no cutting of factory wiring, fully reversible.
  • A resistor, if your truck monitors bulb load. LED lamps draw less current than filament bulbs, which can trigger hyperflash and a bulb-failure warning; a resistor restores the expected load.

Our compatibility sheets currently map fitments with exact harness and resistor part numbers for Hino Dutro (2010–), Hino Profia (2010–2016), Hino Ranger (2017–), Isuzu Giga (2019–) and Isuzu Elf (2010–2022), with coverage expanding. For Fuso and UD models, contact us with your model and year and we will confirm the correct configuration before installation.

6. Verify certification

Many OIRAN lamps are ECE-certified, with E-marks engraved on the lamp and certification numbers published on each product page — the paperwork that matters at inspection time. EU / EEA: verify local regulations before road use; approval requirements vary by country and vehicle category.

7. Final checks

  • Confirm whether the selected reference is supplied per side or as a left/right set.
  • Select the lens variant (red, clear, red/clear) per side.
  • Confirm warranty terms on the product page; select models such as the JUNIOR carry a 1-year warranty against water leakage and lighting failure.
  • Reflectors: if you chose a module-type lamp, add the separate reflector your regulations require.

Start with the footprint, end with the wiring, and the middle — which signature your truck wears — is the enjoyable part. Browse the full tail lamp lineup, or call an expert at +81 857-22-1777 with your truck's make, model and year.