ICMP RTT measurements from Taipei, Taiwan to Tokyo, Japan: average latency, jitter, packet loss, and physical efficiency for this East Asia route.

🇹🇼 Taipei, Taiwan (TPE) → 🇯🇵 Tokyo, Japan (TYO)

Measurement round: 2026-08-15T04:03:13Z.

The 2026-08-15T04:03:13Z round for Taipei to Tokyo returned a 31.6 ms average RTT, with a 30.5 ms minimum and 34.84 ms maximum over 50 samples. Jitter was 0.79 ms and packet loss was 0%, making this a very tidy short-haul path.

The average is 1.54 times the 20.58 ms fiber-floor RTT for the 2,101.2 km great-circle distance, an efficiency of 65.1% against the physical ideal. This leaves a relatively small gap between measured and theoretical performance, pointing to an efficient physical path.

This route ranks second among the 19 outbound paths measured from Taipei. Its standard deviation of 0.96 ms is about 3.0% of the mean, effectively matching the 3.08% network median, so the low latency is also consistent across the measurement window.

Latency Summary

Metric	Value
RTT	31.6 ms
Jitter	0.79 ms
Packet Loss	0%
Standard Fiber Floor	20.58 ms
Fiber Efficiency	65.1%
Latency Tier	Excellent
Source Region	Asia Pacific
Destination Region	Asia Pacific

Ping Measurement Series

The chart below renders the 50-sample ICMP echo measurement round for this route; an accessible table of every sample is included with the chart.

Ping series: TPE → TYO

50 ICMP echo samples at 100 ms intervals · round 2026-08-15T04:03:13Z · avg 31.6 ± 0.14 ms (SE)

Sample distribution: box = interquartile range (30.9–32.1 ms), median 31.3 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 (20.6 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	32.48
2	100	31.43
3	200	34.34
4	300	32.92
5	400	32.41
6	500	31.19
7	600	30.77
8	700	31.40
9	800	31.84
10	900	30.92
11	1000	31.04
12	1100	30.97
13	1200	32.71
14	1300	33.22
15	1400	32.16
16	1500	31.24
17	1600	30.92
18	1700	30.72
19	1800	31.13
20	1900	32.12
21	2000	30.99
22	2100	31.10
23	2200	30.82
24	2300	30.66
25	2400	30.50
26	2500	34.84
27	2600	33.18
28	2700	32.86
29	2800	31.36
30	2900	32.26
31	3000	31.49
32	3100	30.81
33	3200	30.53
34	3300	31.38
35	3400	31.62
36	3500	31.11
37	3600	31.16
38	3700	30.81
39	3800	30.67
40	3900	33.18
41	4000	31.93
42	4100	31.51
43	4200	31.26
44	4300	30.94
45	4400	31.74
46	4500	31.25
47	4600	30.96
48	4700	30.61
49	4800	31.61
50	4900	30.93

Download This Route's Data

This route's measurement round is published as open data (CC BY 4.0) in CSV, JSON, and YAML. See About This Measurement for citation guidance.

Download this dataset

Per-route ICMP ping series, released under CC BY 4.0. Uncompressed plain text — no decompression step needed.

CSV JSON YAML Full dataset

Theoretical Fiber Latency

The public physical reference uses the GeoNames city centres for Taipei (25.05306, 121.52639) and Tokyo (35.68950, 139.69171). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	2,101.2 km
Vacuum RTT floor	14.02 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	20.58 ms
Low-latency fiber material floor	20.49 ms
Engineering floor (5% path allowance)	21.61 ms
Research 1.33× mapped-fiber reference	27.37 ms
Estimated unamplified path loss	441.3 dB
Transparent optical spans / inline amplifiers	28 / 27
Published RTT inflation over fiber floor	1.54×

Attenuation is used to estimate the number of 80 km optical spans; it does not directly slow light. See the full theoretical fiber latency, GeoNames, attenuation, and amplifier methodology.

Stability & Trend

The current measurement round (2026-08-15T04:03:13Z) collected 50 ICMP echo samples on this route. Distribution statistics from that round:

Round Statistic	Value
Minimum RTT	30.5 ms
Average RTT	31.6 ms
Maximum RTT	34.84 ms
Standard deviation	0.96 ms
Stdev / average	3.0%

RTT trend

Estimated route stability across the selected time window.

Average: 31.6 ms
Minimum: 31.3 ms
Maximum: 31.9 ms
Average loss: 0.03%

Route Context

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

Reverse direction

Tokyo to Taipei latency and RTT — 32.1 ms

Fastest routes departing Taipei (TPE)

Taipei to Hong Kong latency and RTT — 15.4 ms
Taipei to Singapore latency and RTT — 44.2 ms
Taipei to Seattle latency and RTT — 115.7 ms
Taipei to Moscow latency and RTT — 131.7 ms
Taipei to Sydney latency and RTT — 131.8 ms

Fastest routes arriving at Tokyo (TYO)

Hong Kong to Tokyo latency and RTT — 45 ms
Singapore to Tokyo latency and RTT — 69.6 ms
Seattle to Tokyo latency and RTT — 84.8 ms
Los Angeles to Tokyo latency and RTT — 100.9 ms
Sydney to Tokyo latency and RTT — 101.6 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 — 15.2 ms

About This Measurement

Published RTT reflects best-case backbone path behavior measured with ICMP echo probes between PoPs. End-user latency also depends on local access networks, congestion, routing policy, and traffic engineering. None of these values is an SLA.

The measurement round behind this page is published as open data under CC BY 4.0 in the Hats Network latency dataset. Per-pair files are available at /opendata/latency/latest/pairs/tpe-tyo.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Taipei → Tokyo round 2026-08-15T04:03:13Z, CC BY 4.0".

Data auto-generated on August 15, 2026. Explore the full interactive latency matrix or browse more city-pair routes.

Taipei, Taiwan → Tokyo, Japan RTT