Chemical tanker · Japan flag · built 2015
MAYARO: CO₂ emissions 2018–2025
IMO 9733703 EU ETS8 reporting years
- CO₂ reported 2025
- 4,742 t
- Fuel burned
- 1,498 t
- Distance
- 23,327 nm
- Time at sea
- 2,330 h
- Emitted at berth
- 6% of total
- Share of year under way
- 27%
- Gross tonnage
- 21,129
MAYARO against its type
Built in 2015, it is 5 years newer than the median chemical tanker on this register, which was built in 2010 (1,951 vessels with a known build year). At 21,129 gross tonnage it is smaller than 54% of the other 1,899 chemical tankers with a recorded tonnage. It is one of 3 chemical tankers here under the Japan flag, 0.1% of the 2,344 on the register. The returns for 2018–2025 all give TOKYO as port of registry.
Its 4,742 t of CO₂ for 2025 is 14% below the median of 5,531 t among the 1,484 chemical tankers on this register that reported for 2025. Per nautical mile it emitted 203.3 kg CO₂, 19% below the type median of 250.2 kg. It logged 2,330 hours at sea against a median of 2,106 hours for its type that year. 5.6% of its 2025 emissions were at berth; the median for chemical tankers was 6.6%. Across 8 years with reported emissions, the highest was 2020 (9,031 t) and the lowest 2025 (4,742 t). Its efficiency percentile within the type went from 49 in 2018 to 28 in 2025 (lower is more efficient). Of the 7 comparable vessels listed below with a 2025 return, 0 reported a lower CO₂ per nautical mile than this vessel.
Emissions by year2018–2025
| Year | CO₂ (t) | Fuel (t) | Distance (nm) | At sea (h) | At berth (t) | kg CO₂/nm | EEOI | Percentile |
|---|---|---|---|---|---|---|---|---|
| 2025 | 4,742 | 1,498 | 23,327 | 2,330 | 265 | 203.3 | 10.7 | 28 |
| 2024 | 5,842 | 1,848 | — | 2,393 | 0 | 191.5 | — | — |
| 2023 | 5,807 | 1,832 | 29,735 | 2,490 | 335 | 195.3 | 9.8 | 15 |
| 2022 | 5,916 | 1,869 | 28,492 | 2,289 | 280 | 207.6 | 12.6 | 34 |
| 2021 | 7,118 | 2,252 | 37,949 | 3,030 | 281 | 187.6 | 12.7 | 30 |
| 2020 | 9,031 | 2,856 | 43,392 | 3,700 | 285 | 208.1 | 14.1 | 40 |
| 2019 | 6,807 | 2,176 | 32,267 | 2,766 | 237 | 210.9 | 13.0 | 31 |
| 2018 | 7,341 | 2,349 | 31,100 | 2,697 | 197 | 236.0 | 16.2 | 49 |
Vessel particulars
- IMO number
- 9733703
- Ship type
- Chemical tanker
- Gross tonnage
- 21,129
- Length overall
- 175.0 m
- Beam
- 27.7 m
- Year built
- 2015
- Flag state
- Japan per EU MRV 2025
- Port of registry
- Tokyo MRV 2025
- Ice class
- IC
- Technical efficiency (design)
- EEDI (5.63 gCO₂/t·nm)
- Verifier
- Nippon Kaiji Kyokai, Japan
- Accreditation
- VS-21325-01
- Compliance document issued
- 2026-04-03
- Compliance document expires
- 2027-06-30
Efficiency against its own type2025
Position 380 of 1,348 qualifying chemical tankers by EEOI, at the 28th percentile. The dashed line is the type median, 14.4; this vessel reported 10.7.
EEOI divides emissions by transport work, which for this vessel and year was 444,022,472 tonne-miles over 23,327 nautical miles.
Reported CO₂ by year
Reported CO₂ in 2025 was 35.4% lower than in 2018, for EU/EEA voyages only.
From 2024 to 2025, emissions fell 18.8% and CO₂ per nautical mile rose 6.2%.Distance is missing for at least one of the two years, so activity and efficiency cannot be separated here.
Where the 2025 emissions occurred
Methane, nitrous oxide and EU ETS2025
- Total CO₂ equivalent
- 4,816 t
- Methane (CH₄)
- 0.07 t
- Nitrous oxide (N₂O)
- 0.27 t
Sources and how to read this
- Emissions: EU MRV publication (THETIS-MRV), reporting years 2018–2025, published by the European Commission.
- Vessel particulars: Wikidata (CC0).
This page draws on 8 MRV reporting years, an efficiency ranking and 4 of 5 vessel particulars. Not found in the sources for this vessel: AIS movements in Norwegian waters, a name history, a licensed photograph, a sanctions listing and US port state inspections.
Empty means unreported, never zero. How EEOI, distance, percentiles and sister ships are handled is explained under reading a vessel page. Something wrong? See corrections.