Explore Tokyo, Japan to Singapore ICMP RTT, jitter, packet loss and fiber latency limits on the AS203314 network. View route data.

🇯🇵 Tokyo, Japan (TYO) → 🇸🇬 Singapore (SIN)

Measurement round: 2026-08-16T04:07:28Z.

Tokyo to Singapore averaged 69.4 ms across 50 replies. The observed range was 66.32 to 80.7 ms; these figures describe one probe round, not a long-term service target.

This is number 3 of 19 outgoing routes by average RTT. That ranking compares different destinations and is not adjusted for distance.

Latency Summary

Metric	Value
RTT	69.4 ms
Jitter	2.27 ms
Packet Loss	0%
Standard Fiber Floor	52 ms
Fiber Efficiency	74.9%
Latency Tier	Excellent
Source Region	Asia Pacific
Destination Region	Asia Pacific

Ping Measurement Series

50 ICMP echo probes were recorded in this round. Individual replies and their distribution are shown below.

Ping series: TYO → SIN

50 ICMP echo samples at 100 ms intervals · round 2026-08-16T04:07:28Z · avg 69.4 ± 0.46 ms (SE)

Sample distribution: box = interquartile range (67.2–69.9 ms), median 68.4 ms · whiskers = min–max · diamond = round average · each dot is one measured sample.

How to read this chart

The shaded band spans the measured minimum to maximum RTT of all samples collected up to that point, and the thin line traces the running average. The final position therefore matches the round statistics exactly. The band only widens when a new extreme sample arrives.

The dashed line is the round average, and the shaded band at the bottom is the theoretical fiber-optic floor (52.0 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	77.88
2	100	72.95
3	200	69.73
4	300	67.81
5	400	66.88
6	500	66.32
7	600	67.84
8	700	67.01
9	800	68.36
10	900	68.54
11	1000	71.39
12	1100	80.70
13	1200	73.58
14	1300	68.72
15	1400	67.23
16	1500	67.97
17	1600	68.21
18	1700	68.67
19	1800	66.81
20	1900	69.90
21	2000	68.16
22	2100	68.97
23	2200	68.44
24	2300	68.41
25	2400	69.79
26	2500	68.17
27	2600	66.60
28	2700	67.82
29	2800	67.26
30	2900	66.49
31	3000	68.97
32	3100	67.39
33	3200	66.82
34	3300	68.69
35	3400	72.06
36	3500	79.77
37	3600	71.40
38	3700	70.23
39	3800	69.75
40	3900	67.30
41	4000	75.58
42	4100	73.44
43	4200	70.42
44	4300	67.69
45	4400	66.91
46	4500	69.85
47	4600	67.18
48	4700	66.70
49	4800	66.57
50	4900	66.67

Download This Route's Data

Download the probe round as CSV, JSON or YAML under CC BY 4.0. Citation details include the route and round timestamp.

CSV JSON YAML Full dataset

Theoretical Fiber Latency

The propagation model uses public city-centre coordinates from GeoNames: Tokyo (35.68950, 139.69171) and Singapore (1.28967, 103.85007). These are not facility coordinates or a surveyed cable path.

Physical Reference	Value
WGS-84 geodesic distance	5,310.2 km
Vacuum RTT floor	35.43 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	52 ms
Low-latency fiber material floor	51.79 ms
Engineering floor (5% path allowance)	54.61 ms
Research 1.33× mapped-fiber reference	69.16 ms
Estimated unamplified path loss	1115.1 dB
Transparent optical spans / inline amplifiers	70 / 69
Published RTT inflation over fiber floor	1.33×

The span count assumes 80 km optical spans. Attenuation is a power-loss term, not a propagation delay. See the model assumptions and equations.

Stability & Trend

Statistics from the same 50 replies. They describe this probe round, not continuous historical monitoring.

Round Statistic	Value
Minimum RTT	66.32 ms
Average RTT	69.4 ms
Maximum RTT	80.7 ms
Standard deviation	3.27 ms
Stdev / average	4.7%

Estimated RTT trend

Modeled comparison, not historical probe measurements.

Average: 69.4 ms
Minimum: 68.8 ms
Maximum: 70.0 ms
Average loss: 0.01%

Route Context

Departure PoP: Tokyo (TYO)
Destination PoP: Singapore (SIN)
Region overview: Asia Pacific → Asia Pacific
Full global matrix: Backbone Latency Matrix
Physical methodology: Theoretical Fiber Latency

Reverse direction

Singapore to Tokyo latency and RTT: 68.9 ms

Fastest routes departing Tokyo (TYO)

Tokyo to Taipei latency and RTT: 32.3 ms
Tokyo to Hong Kong latency and RTT: 44.8 ms
Tokyo to Seattle latency and RTT: 84.8 ms
Tokyo to Los Angeles latency and RTT: 101.2 ms
Tokyo to Sydney latency and RTT: 101.9 ms

Fastest routes arriving at Singapore (SIN)

Hong Kong to Singapore latency and RTT: 31.5 ms
Taipei to Singapore latency and RTT: 44.3 ms
Melbourne to Singapore latency and RTT: 88.4 ms
Sydney to Singapore latency and RTT: 94.5 ms
Marseille to Singapore latency and RTT: 139.6 ms

Same corridor (Asia Pacific → Asia Pacific)

Melbourne to Sydney latency and RTT: 9.8 ms
Sydney to Melbourne latency and RTT: 9.8 ms
Hong Kong to Taipei latency and RTT: 14.7 ms

About This Measurement

These ICMP measurements cover the two backbone endpoints. Access networks, routing policy and load can change an end user's result. A probe round is not an SLA.

The underlying replies are available under CC BY 4.0 in the Hats Network latency dataset. Per-pair files are available at /opendata/latency/latest/pairs/tyo-sin.pings.{csv,json,yaml}. Cite the route, round timestamp and dataset version. Example: "Hats Network latency dataset, Tokyo → Singapore round 2026-08-16T04:07:28Z, CC BY 4.0".

Round published August 16, 2026. See the full interactive latency matrix or browse more city-pair routes.

Tokyo, Japan → Singapore RTT