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Minamidaito Island

In Service

410 km · 2 Landing Points · 1 Countries · Ready for Service: 2011

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Specifications

Length410 km
StatusIn Service
Ready for Service2011
Landing Points2
Countries1

Owners

Okinawa Prefecture

Landing Points (2)

Location Country Position
Itoman, Japan JP Japan 26.1149°, 127.6881°
Minamidaito, Japan JP Japan 25.8430°, 131.2426°

📡 Live Performance

159
measurements
3
probes
1
days monitored
266.3
ms avg RTT
0
anomalies

Monitored from 2026-05-28 through 2026-05-29 — live ICMP round-trip time measurements via RIPE Atlas probes. All values below are recomputed daily from raw probe data. ✓ No anomalies detected in the monitored period.

Measurement sources

Probe Location Samples Avg Min–Max Last seen
#1014473 own probe Minsk BY 53 259.7 ms 255.7–308.8 2026-05-29
#1014589 own probe Almaty KZ 53 269.9 ms 266.8–274.8 2026-05-29
#1014597 own probe Tbilisi GE 53 269.4 ms 267.7–304.6 2026-05-29

About the Minamidaito Island Cable System

Overview

The Minamidaito Island cable is a regional submarine cable system connecting two points within Japan. It was ready for service in 2011 and is operated by Okinawa Prefecture, the sole owner.

Route and Landings

Japan:

  • Itoman
  • Minamidaito

Ownership and Operators

The cable is owned and operated by Okinawa Prefecture.

Status and Timeline

The Minamidaito Island cable was ready for service in 2011. The status of the cable remains unknown, with no further details provided on its current operational state or any planned maintenance or decommissioning timelines.

Strategic Context

The corridor connects two locations within Japan, supporting telecommunications and enterprise connectivity needs within the country's domestic network infrastructure. The cable links Itoman and Minamidaito islands, both of which are part of Okinawa Prefecture in southern Japan. These islands serve as important transit points for submarine cables that connect the Japanese mainland with other parts of Asia and the Pacific region.

Minamidaito Island, in particular, is one of the smaller islands but holds importance as a landing point for submarine cables.

The Ryukyu Islands, including Okinawa Island and Minamidaito Island, are significant in Japan's regional infrastructure due to their geographical position. They serve as important landing points for submarine cables that connect the Japanese mainland with other parts of Asia and the Pacific region.

📡 Health

Status✓ Normal
RTT258.85 ms / base 259.04 ms
Last checked2026-05-29 18:01

Monitored using RIPE Atlas probes. Open monitoring →

📊 RTT History

Route: #1014473 → Sao Paulo Measured: 2026-05-29 18:01
258.9 ms
Min Avg Max #
7 days 255.7 259.7 308.8 53
30 days 255.7 259.7 308.8 53
60 days 255.7 259.7 308.8 53

Health Timeline

Wed, Jun 3
View full event log →
🔗
Hop Anomaly
7ms → 45ms (6.20×)
17:02
🔗
Hop Anomaly
5ms → 50ms (10.97×)
09:02
Sun, May 17
View full event log →
🔗
Hop Anomaly
3ms → 57ms (17.90×)
17:00
Fri, May 15
View full event log →
🔗
Hop Anomaly
4ms → 33ms (9.16×)
03:00
Mon, Apr 27
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🔗
Hop Anomaly
4ms → 60ms (15.72×)
03:00
Sat, Apr 11
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🔗
Hop Anomaly
11ms → 49ms (4.58×)
15:00
Sun, Apr 5
View full event log →
🔗
Hop Anomaly
6ms → 47ms (7.42×)
07:00

FAQ

What is the length of the Minamidaito Island cable?
The Minamidaito Island submarine cable is 410 km long.
Which countries does Minamidaito Island connect?
Minamidaito Island connects 1 country via 2 landing points.
Who owns the Minamidaito Island cable?
Minamidaito Island is owned by a consortium including Okinawa Prefecture.
When was Minamidaito Island put into service?
The Minamidaito Island cable entered service in 2011.
Minamidaito Island
  • Length410 km
  • StatusIn Service
  • Ready for Service2011

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