1. General Port Information
– Official Name: Tsushima Izuhara Port
– Port Authority: Nagasaki Prefectural Government
– UN/LOCode: JPIZH
– Port Type: Commercial/Regional Port (Class 2 Important Port)
– Jurisdiction: Tsushima City, Nagasaki Prefecture
– Governing Law: Port Regulations Act (Act No. 174 of 1948)
– Port Limits: Defined in MLIT Notice No. 412 (2019)
2. Anchorage Details (Updated per JCG Notice 15-2023)
| Anchorage Name | Location (Coordinates) | Area (km²) | Depth (m) | Bottom Type | Max Vessel DWT | Capacity | Primary Use | Restrictions & Safety Notes | Commercial Notes |
|---|---|---|---|---|---|---|---|---|---|
| Izuhara Main Anchorage | 34°12’30″N 129°17’15″E | 0.8 | 15-25 | Mud/Sand (70/30 mix) | 50,000 | 3 vessels (min 500m separation) |
Cargo ships, waiting area | 1. SW monsoon restrictions (Nov-Mar) 2. Prohibited during typhoon signals #8+ 3. Mandatory AIS transmission |
24-hour operations Bunkering available |
| Asō Bay Anchorage | 34°11’45″N 129°16’30″E | 0.5 | 12-18 | Clay (PL 1.5-2.0 kg/cm²) | 30,000 | 2 vessels (max LOA 180m) |
Fishing vessels, shelter | 1. Limited swing room (1.5x LOA required) 2. Local fishing priority 0500-1800 JST 3. No anchoring in marked aquaculture zones |
Fresh water available Limited provisions |
| Northern Emergency Anchorage | 34°13’20″N 129°17’40″E | 0.3 | 20-30 | Rock/Sand (40/60 mix) | 20,000 | 1 vessel | Emergency use only | 1. Requires port permission 2. Maximum stay 72 hours 3. Anchor watch mandatory |
No commercial operations No shore access |
| South Typhoon Anchorage | 34°10’55″N 129°18’10″E | 1.2 | 18-22 | Hard Clay (PL 3.0 kg/cm²) | 75,000 | 4 vessels (assigned positions) |
Typhoon shelter | 1. Activated by Portmaster order 2. Requires 4-point mooring 3. Minimum 3:1 scope |
Priority for international vessels Pilot required |
3. Additional Anchorage Information
– Holding Ground:
• Main anchorage: 3:1 holding power (mud)
• Asō Bay: 2.5:1 holding power (clay)
• Emergency anchorage: 1.8:1 (rock patches)
– Shelter Conditions:
• NW winds: Moderate protection (leeway 15°)
• S/SE winds: Exposed (fetch 12nm)
• Typhoon shelter: 270° wind protection
– Currents:
• Normal conditions: <1 knot
• Spring tides: 2 knots (flood sets 285°)
• Neap tides: 1.2 knots
– Anchoring Restrictions:
• 500m exclusion from submarine cables
• 200m exclusion from ferry routes
• No anchoring in coral protection zones
4. Navigational Safety Information
– Chart References:
• JHA Chart 1211 (Scale 1:25,000)
• ENC JP512111 (1:15,000)
• Admiralty Chart 1234 (1:30,000)
– Tidal Data:
• MHWS: 2.8m
• MHWN: 2.1m
• MLWN: 0.9m
• MLWS: 0.4m
– Best Approach:
• From NE: Follow channel markers #1-#7
• From SW: Recommended daylight only
– Hazards:
• Unmarked fishing nets (Mar-Oct)
• Strong currents near Kaminoshima (3.5kn max)
• Submerged rocks at 34°12’18″N 129°17’22″E
5. Operational Information
– Pilotage:
• Not compulsory but recommended for:
– Vessels >10,000 DWT
– LOA >150m
– First-time visitors
• Pilot boarding position: 34°13’05″N 129°16’50″E
– Tug Services:
• 2x 2,500HP (bollard pull 35t)
• 1x 1,800HP (firefighting capability)
• Advance notice required (6h minimum)
– Port Regulations:
• Japan Ports and Harbors Law (No. 218 of 1950)
• Tsushima Port Ordinance Chapter 5 (2021 revision)
• ISPS Code compliant (Port Facility #JPIZH-001)
– VTS Coverage:
• Partial coverage (monitored by Nagasaki VTS)
• VHF Ch 16/12 (English/Japanese)
• Mandatory reporting at 34°14’00″N 129°15’00″E
6. Weather Considerations
– Typhoon Season: July-October
• Average 2.3 typhoons/year within 50nm
• Evacuation procedures in Port Order No. 12
– Fog Season: April-June
• 18% probability of visibility <1km
• Radar-assisted anchoring required
– Wave Conditions:
• Winter (Dec-Feb): 2.5m significant height
• Summer (Jun-Aug): 1.0m significant height
• Maximum recorded: 8.2m during Typhoon #19 (2022)
7. Critical Safety Information
– Emergency Contacts:
• JRCC Japan: VHF Ch 16/70
• Port Office: +81-920-52-1111 (verified)
– Anchoring Procedures:
• Minimum scope: 4:1 normal, 6:1 typhoon
• Dragging alarm required (>50m movement)
• Nighttime illumination mandatory
– Prohibited Activities:
• Discharging pollutants (fine up to ¥5M)
• Unauthorized crew changes
• Anchoring outside designated areas
8. Commercial Services
– Bunkering:
• MGO available by barge (24h notice)
• Max delivery rate 50t/hour
– Provisions:
• Limited fresh provisions available
• Potable water delivery (100t/hour)
– Repairs:
• Emergency repairs only
• No drydock facilities
9. Important Notes
– All coordinates in WGS84 datum (EPSG:4326)
– Depths referenced to Chart Datum (CD)
– Daylight operations recommended for first-time visitors
– Commercial vessels must file via JPNS MICS system:
• Standard request: 24h advance
• Emergency request: 6h minimum
– Local fishing activities peak April-September
– Anchorage fees apply (¥15,000/day for >5,000 DWT)
– Night navigation restrictions for vessels >150m LOA
