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

🇯🇵 Tokyo, Japan (TYO) → 🇳🇱 Amsterdam, Netherlands (AMS)

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

Tokyo to Amsterdam averaged 197.4 ms, compared with a 91.18 ms city-centre fiber reference. The difference cannot be assigned to a particular cable or carrier from RTT alone.

Standard deviation was 6.74 ms, or 3.4% of the average. This describes variation within the sample without identifying its cause.

Latency Summary

Metric	Value
RTT	197.4 ms
Jitter	5.76 ms
Packet Loss	0%
Standard Fiber Floor	91.18 ms
Fiber Efficiency	46.2%
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 → AMS

50 ICMP echo samples at 100 ms intervals · round 2026-08-16T04:07:28Z · avg 197.4 ± 0.95 ms (SE)

Sample distribution: box = interquartile range (192.6–199.9 ms), median 195.6 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 (91.2 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	191.12
2	100	191.87
3	200	193.02
4	300	194.10
5	400	192.47
6	500	198.14
7	600	192.16
8	700	191.79
9	800	194.98
10	900	191.27
11	1000	191.98
12	1100	215.97
13	1200	201.88
14	1300	196.39
15	1400	192.88
16	1500	190.71
17	1600	199.01
18	1700	193.98
19	1800	196.56
20	1900	194.46
21	2000	196.17
22	2100	191.63
23	2200	193.87
24	2300	199.20
25	2400	198.19
26	2500	203.30
27	2600	206.35
28	2700	196.13
29	2800	194.41
30	2900	196.24
31	3000	200.06
32	3100	203.99
33	3200	200.30
34	3300	197.30
35	3400	192.11
36	3500	190.34
37	3600	192.37
38	3700	193.16
39	3800	212.81
40	3900	201.15
41	4000	215.04
42	4100	199.68
43	4200	194.21
44	4300	193.05
45	4400	191.29
46	4500	220.50
47	4600	201.22
48	4700	197.62
49	4800	199.99
50	4900	193.58

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 Amsterdam (52.37403, 4.88969). These are not facility coordinates or a surveyed cable path.

Physical Reference	Value
WGS-84 geodesic distance	9,311.4 km
Vacuum RTT floor	62.12 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	91.18 ms
Low-latency fiber material floor	90.82 ms
Engineering floor (5% path allowance)	95.76 ms
Research 1.33× mapped-fiber reference	121.28 ms
Estimated unamplified path loss	1955.4 dB
Transparent optical spans / inline amplifiers	123 / 122
Published RTT inflation over fiber floor	2.16×

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	190.34 ms
Average RTT	197.4 ms
Maximum RTT	220.5 ms
Standard deviation	6.74 ms
Stdev / average	3.4%

Estimated RTT trend

Modeled comparison, not historical probe measurements.

Average: 197.6 ms
Minimum: 195.8 ms
Maximum: 199.6 ms
Average loss: 0.04%

Route Context

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

Reverse direction

Amsterdam to Tokyo latency and RTT: 198.2 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 Amsterdam (AMS)

London to Amsterdam latency and RTT: 5.2 ms
Frankfurt to Amsterdam latency and RTT: 5.9 ms
Paris to Amsterdam latency and RTT: 7 ms
Berlin to Amsterdam latency and RTT: 7.2 ms
Marseille to Amsterdam latency and RTT: 20.3 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-ams.pings.{csv,json,yaml}. Cite the route, round timestamp and dataset version. Example: "Hats Network latency dataset, Tokyo → Amsterdam 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 → Amsterdam, Netherlands RTT