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JPTYO SGSIN
Electronics

Tokyo to Singapore freight CO2 emissions

One tonne of cargo shipped Tokyo (JPTYO) to Singapore (SGSIN) by sea emits 39.8 kg CO2e well-to-wake at GLEC v3.2 default factors. The same tonne by air emits 3,252.8 kg — roughly 82x the sea number.

Lane noteJapan-Southeast Asia trunk — 7-8 day sailings transiting the East China Sea and South China Sea before approaching Singapore Strait. Heavy electronics and Toyota/Honda parts flow; Singapore handles onward transshipment to South Asia and Europe.

Per-tonne CO2e by mode

Sea freight

Container ship 3,000-8,000 TEU

39.8
kg CO2e
Distance
5,300 km
Factor (WTW)
7.5 g CO2e/tkm
Per shipment
1 t × 5,300 km
Factor source
GLEC v3.2 container 8,000-15,000 TEU (Post-Panamax, WTW)

Air freight

Long-haul belly cargo

3,252.8
kg CO2e
Distance
5,350 km
Factor (WTW)
608 g CO2e/tkm
Per shipment
1 t × 5,350 km
Factor source
GLEC v3.2 long-haul belly cargo allocation (WTW)

Mode comparison

On the Tokyo to Singapore lane, air freight emits about 82 times more CO2e per tonne than sea freight at GLEC v3.2 defaults. The gap is driven by the WTW factor difference between long-haul belly cargo (608 g CO2e/tkm) and a Container ship 3,000-8,000 TEU (7.5 g CO2e/tkm), partly offset by the shorter great-circle air routing.

Try this in the calculator

These numbers are GLEC v3.2 defaults at 1 tonne. Change weight, vessel class, or load factor in the calculator and see the per-mode CO2e update under ISO 14083:2023 data quality tiers.

Methodology references

Need primary-data emissions for Tokyo to Singapore?

The EcoFreight API ingests AIS, bunker delivery notes, and shipment manifests to return ISO 14083 Tier 3 primary-data numbers for the same lane. Free tier covers 1,000 calculations per month.