Explore Tokyo, Japan to Frankfurt, Germany ICMP RTT, jitter, packet loss and fiber latency limits on the AS203314 network.

🇯🇵 Tokyo, Japan (TYO) → 🇩🇪 Frankfurt, Germany (FRA)

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

Tokyo to Frankfurt averaged 193.2 ms, compared with a 91.61 ms city-centre fiber reference. The difference cannot be assigned to a particular cable or carrier from RTT alone.

Standard deviation was 3.37 ms, or 1.7% of the average. This describes variation within the sample without identifying its cause.

Latency Summary

Metric	Value
RTT	193.2 ms
Jitter	2.63 ms
Packet Loss	0%
Standard Fiber Floor	91.61 ms
Fiber Efficiency	47.4%
Latency Tier	Fair
Source Region	Asia Pacific
Destination Region	Europe

Ping Measurement Series

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

Ping series: TYO → FRA

50 ICMP echo samples at 100 ms intervals · round 2026-08-16T04:07:28Z · avg 193.2 ± 0.48 ms (SE)

Sample distribution: box = interquartile range (190.9–193.8 ms), median 191.7 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 (91.6 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	191.00
2	100	189.92
3	200	191.53
4	300	190.31
5	400	191.25
6	500	193.77
7	600	193.79
8	700	192.04
9	800	203.54
10	900	200.49
11	1000	194.17
12	1100	191.42
13	1200	191.60
14	1300	191.80
15	1400	198.29
16	1500	194.48
17	1600	191.57
18	1700	190.72
19	1800	193.34
20	1900	190.80
21	2000	191.34
22	2100	190.91
23	2200	192.08
24	2300	198.75
25	2400	201.03
26	2500	197.11
27	2600	192.84
28	2700	193.45
29	2800	191.40
30	2900	190.87
31	3000	190.90
32	3100	190.34
33	3200	192.49
34	3300	190.85
35	3400	190.40
36	3500	191.58
37	3600	191.01
38	3700	192.27
39	3800	190.40
40	3900	193.23
41	4000	191.05
42	4100	196.38
43	4200	192.06
44	4300	190.98
45	4400	198.87
46	4500	195.40
47	4600	193.15
48	4700	190.69
49	4800	190.17
50	4900	202.17

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 Frankfurt am Main (50.11552, 8.68417). These are not facility coordinates or a surveyed cable path.

Physical Reference	Value
WGS-84 geodesic distance	9,354.4 km
Vacuum RTT floor	62.41 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	91.61 ms
Low-latency fiber material floor	91.24 ms
Engineering floor (5% path allowance)	96.2 ms
Research 1.33× mapped-fiber reference	121.84 ms
Estimated unamplified path loss	1964.4 dB
Transparent optical spans / inline amplifiers	123 / 122
Published RTT inflation over fiber floor	2.11×

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	189.92 ms
Average RTT	193.2 ms
Maximum RTT	203.54 ms
Standard deviation	3.37 ms
Stdev / average	1.7%

Estimated RTT trend

Modeled comparison, not historical probe measurements.

Average: 193.1 ms
Minimum: 191.1 ms
Maximum: 194.8 ms
Average loss: 0.04%

Route Context

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

Reverse direction

Frankfurt to Tokyo latency and RTT: 194.5 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 Singapore latency and RTT: 69.4 ms
Tokyo to Seattle latency and RTT: 84.8 ms
Tokyo to Los Angeles latency and RTT: 101.2 ms

Fastest routes arriving at Frankfurt (FRA)

Amsterdam to Frankfurt latency and RTT: 5.9 ms
Berlin to Frankfurt latency and RTT: 6.1 ms
Paris to Frankfurt latency and RTT: 7.6 ms
London to Frankfurt latency and RTT: 13.6 ms
Marseille to Frankfurt latency and RTT: 16 ms

Same corridor (Asia Pacific → Europe)

Hong Kong to Moscow latency and RTT: 118.2 ms
Taipei to Moscow latency and RTT: 132.7 ms
Singapore to Marseille latency and RTT: 140.6 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-fra.pings.{csv,json,yaml}. Cite the route, round timestamp and dataset version. Example: "Hats Network latency dataset, Tokyo → Frankfurt 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 → Frankfurt, Germany RTT