Paris MoU vs Tokyo MoU

The two largest port-state-control regimes. How their geography, targeting, white/grey/black lists, and inspector culture differ — and what that means for the ship you're sailing on.

Side-by-side

Criterion	Paris MoU 27 member states — Europe + Canada	Tokyo MoU 21 member states — Asia + Pacific
Geographic coverage	Atlantic Europe + Mediterranean + Canada	Asia-Pacific (Japan, Korea, China, Australia, NZ, Indonesia, etc.)
Inspection regime	NIR (New Inspection Regime) — risk-based targeting	Risk-based targeting via the APCIS database
Publishing	Annual white/grey/black list + monthly detention list	Annual white/grey/black list + monthly detention list
Detention threshold	Strict — deficiencies grouped by severity, detentions for safety-critical findings	Strict — broadly aligned with Paris
Inspector culture	Detailed, document-heavy, ISM-aware	Detailed, often more operational-spot-check
Flag-state impact	Drives flag's white/grey/black-list ranking globally	Drives flag's white/grey/black-list ranking globally
Notable strict ports	Rotterdam, Antwerp, Hamburg, Le Havre, Felixstowe	Tokyo, Yokohama, Singapore, Shanghai, Sydney, Melbourne

Who each suits

Paris MoU
Officers sailing Europe / Mediterranean trades. Strong document discipline + ISM compliance pays off here. PSC inspections frequent on grey/black-list flag vessels.
Tokyo MoU
Officers sailing Asia-Pacific. Operational-readiness focus — fire-fighting, lifesaving, watertight integrity. AMSA (Australia) is particularly stringent.

Pros and cons

Paris MoU

Pros

Transparent risk-based targeting.
Predictable inspection patterns.
Strong feedback loop with class + flag.

Cons

Document-heavy inspections can exhaust the crew.
European ports are expensive — detention = serious owner cost.

Tokyo MoU

Pros

Broad coverage of Asia-Pacific trade.
Operational focus catches real-world deficiencies.
AMSA's enforcement has improved safety culture globally.

Cons

Less linguistic + cultural consistency across member states.
China + some smaller members vary in inspection depth.

Common misunderstandings

'Each MoU has its own list.' The MoUs publish their own white/grey/black lists, but flag-state reputation tracks across both — bad in Paris is usually bad in Tokyo too.
'Tokyo is laxer than Paris.' Not on AMSA + JCG inspections — those are at the top of the strictness scale.
'A detention only matters in the MoU it happened in.' Detentions follow the vessel + flag globally in PSC databases.

FAQ

What about USCG, BS MoU, Riyadh MoU?: USCG runs its own PSC regime independent of the MoUs. Black Sea MoU + Riyadh MoU + Mediterranean MoU + Indian Ocean MoU + Caribbean MoU + Vina del Mar (Latin America) + West & Central Africa MoU cover regional waters. Paris + Tokyo are the largest two by inspection volume.

Primary sources

High confidence

Last verified 14 days ago

Side-by-side

Criterion	Paris MoU 27 member states — Europe + Canada	Tokyo MoU 21 member states — Asia + Pacific
Geographic coverage	Atlantic Europe + Mediterranean + Canada	Asia-Pacific (Japan, Korea, China, Australia, NZ, Indonesia, etc.)
Inspection regime	NIR (New Inspection Regime) — risk-based targeting	Risk-based targeting via the APCIS database
Publishing	Annual white/grey/black list + monthly detention list	Annual white/grey/black list + monthly detention list
Detention threshold	Strict — deficiencies grouped by severity, detentions for safety-critical findings	Strict — broadly aligned with Paris
Inspector culture	Detailed, document-heavy, ISM-aware	Detailed, often more operational-spot-check
Flag-state impact	Drives flag's white/grey/black-list ranking globally	Drives flag's white/grey/black-list ranking globally
Notable strict ports	Rotterdam, Antwerp, Hamburg, Le Havre, Felixstowe	Tokyo, Yokohama, Singapore, Shanghai, Sydney, Melbourne

Who each suits

Paris MoU

Officers sailing Europe / Mediterranean trades. Strong document discipline + ISM compliance pays off here. PSC inspections frequent on grey/black-list flag vessels.

Tokyo MoU

Officers sailing Asia-Pacific. Operational-readiness focus — fire-fighting, lifesaving, watertight integrity. AMSA (Australia) is particularly stringent.

Pros and cons

Paris MoU

Pros

Transparent risk-based targeting.
Predictable inspection patterns.
Strong feedback loop with class + flag.

Cons

Document-heavy inspections can exhaust the crew.
European ports are expensive — detention = serious owner cost.

Tokyo MoU

Pros

Broad coverage of Asia-Pacific trade.
Operational focus catches real-world deficiencies.
AMSA's enforcement has improved safety culture globally.

Cons

Less linguistic + cultural consistency across member states.
China + some smaller members vary in inspection depth.

Common misunderstandings

'Each MoU has its own list.' The MoUs publish their own white/grey/black lists, but flag-state reputation tracks across both — bad in Paris is usually bad in Tokyo too.

'Tokyo is laxer than Paris.' Not on AMSA + JCG inspections — those are at the top of the strictness scale.

'A detention only matters in the MoU it happened in.' Detentions follow the vessel + flag globally in PSC databases.

FAQ

What about USCG, BS MoU, Riyadh MoU?

USCG runs its own PSC regime independent of the MoUs. Black Sea MoU + Riyadh MoU + Mediterranean MoU + Indian Ocean MoU + Caribbean MoU + Vina del Mar (Latin America) + West & Central Africa MoU cover regional waters. Paris + Tokyo are the largest two by inspection volume.

High confidence

Last verified 14 days ago

Paris MoU vs Tokyo MoU

Side-by-side

Who each suits

Pros and cons

Common misunderstandings

FAQ

Related

Primary sources

Paris MoU vs Tokyo MoU

Side-by-side

Who each suits

Pros and cons

Common misunderstandings

FAQ

Related

Primary sources