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Okada Kō Lighthouse

Fl (2) Green 8s🇯🇵Tokyo, JPOperational

Location & Light Range

About Okada Kō Lighthouse

Okada Kō Lighthouse, established in 1939, stands at the end of the breakwater quay at Okada, serving the ferry terminal for boats arriving at Izu Ōshima from Tōkyō. The current concrete tower, which replaced the original structure, is 10 meters high and features a distinctive round hourglass shape with a domed top. Its focal height is 14 meters, and it emits a green light with a single flash every 8 seconds. The lighthouse has a geographic range of 11.6 nautical miles. While the site is open to the public, the tower itself is closed to entry.

Why it matters: This lighthouse is essential for the safe navigation of ferries entering the Okada ferry terminal, connecting Tōkyō with Izu Ōshima.

Light & Optic

Characteristic Signature
Fl (2) Green 8s
Flash Type
Flashing
Light Color
Green
Flash Count
2 flashes
Interval
8s
Raw Code
Fl G 8s
Focal Height
14m
Geographic Range
11.6NM

Construction & History

First Lit
1939

Significant events: Original tower replaced

Visiting

Open to public
Site open, tower closed

Nearby Vessels

Flag
Type
Name
Dist.

Tower & Structure

Tower Height
10m
Tower Shape
cylindrical
Tower Color
white
Material
concrete

Structure: round hourglass-shaped concrete tower with a domed top

Location

City
Tokyo
Country
🇯🇵Japan
Region
Oshima Subprefecture
Sea Region
Located at the end of the breakwater quay at Okada, the ferry terminal for boats arriving at Izu Ōshima from Tōkyō.
Latitude
34.7925°
Longitude
139.3889°

References & Identifiers

Nearest Port
Ohshima, Tokyo(3.3 km)
Admiralty No.
M7125.5
NGA No.
3202
ARLHS No.
JPN-478
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Frequently Asked Questions

How do mariners identify Okada Kō Lighthouse at night?+
Okada Kō displays the characteristic Fl (2) Green 8s — 2 green flashes every 8 seconds. Each lighthouse has a unique flash pattern published in the List of Lights, allowing mariners to positively identify it and distinguish it from other navigation aids in the area. The green color may indicate a specific sector or warning zone.
Which ports and harbors does Okada Kō Lighthouse guide vessels into?+
Okada Kō Lighthouse assists vessels approaching 5 nearby ports. The closest is Okada at 0.1 NM to the SW. Other ports served include Nishitokyo (8 NM ESE), Inatori (17 NM W), Toshima/Tokyo (17.6 NM SSW), Itoh, Shizuoka (17.9 NM NW). Mariners should consult the relevant chart for full approach and pilotage information.
Is Okada Kō Lighthouse still active and maintained?+
Yes, Okada Kō Lighthouse is currently operational. It is actively maintained and continues to emit its characteristic light signal for marine navigation. Most modern lighthouses are automated and monitored remotely by the national maritime authority.
What shipping routes pass near Okada Kō Lighthouse?+
Okada Kō Lighthouse is located within the Japan / Korea shipping lane — a busy shipping corridor linking the major ports of Japan and South Korea. This makes it an important navigation reference for commercial shipping traffic in the region.
How can I track vessels near Okada Kō Lighthouse?+
You can track vessels near Okada Kō Lighthouse in real time using MarineRadar. The platform shows live AIS positions of ships in the area, including vessel name, type, flag, speed, and course. Use the "Track Vessels Nearby" button on this page to open the live map centered on this lighthouse.