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

🇫🇷 Marseille, France (MRS) → 🇯🇵 Tokyo, Japan (TYO)

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

Marseille to Tokyo averaged 203.8 ms, compared with a 99.03 ms city-centre fiber reference. The difference cannot be assigned to a particular cable or carrier from RTT alone.

Standard deviation was 8.55 ms, or 4.2% of the average. This describes variation within the sample without identifying its cause.

Latency Summary

Metric	Value
RTT	203.8 ms
Jitter	7.35 ms
Packet Loss	0%
Standard Fiber Floor	99.03 ms
Fiber Efficiency	48.6%
Latency Tier	Fair
Source Region	Europe
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: MRS → TYO

50 ICMP echo samples at 100 ms intervals · round 2026-08-16T04:07:28Z · avg 203.8 ± 1.21 ms (SE)

Sample distribution: box = interquartile range (198.7–206.4 ms), median 201.6 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 (99.0 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	196.76
2	100	206.13
3	200	198.15
4	300	201.01
5	400	209.98
6	500	202.57
7	600	198.66
8	700	199.96
9	800	199.54
10	900	197.17
11	1000	202.48
12	1100	208.90
13	1200	201.37
14	1300	202.33
15	1400	228.12
16	1500	208.09
17	1600	200.74
18	1700	199.52
19	1800	201.79
20	1900	199.04
21	2000	206.05
22	2100	201.99
23	2200	196.82
24	2300	214.56
25	2400	209.49
26	2500	198.84
27	2600	204.70
28	2700	203.26
29	2800	215.18
30	2900	203.83
31	3000	216.18
32	3100	241.85
33	3200	212.69
34	3300	200.12
35	3400	209.93
36	3500	202.58
37	3600	198.27
38	3700	194.97
39	3800	194.59
40	3900	196.42
41	4000	202.42
42	4100	196.58
43	4200	196.50
44	4300	212.96
45	4400	206.55
46	4500	200.04
47	4600	196.46
48	4700	195.85
49	4800	198.72
50	4900	199.29

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: Marseille (43.29695, 5.38107) and Tokyo (35.68950, 139.69171). These are not facility coordinates or a surveyed cable path.

Physical Reference	Value
WGS-84 geodesic distance	10,112.8 km
Vacuum RTT floor	67.47 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	99.03 ms
Low-latency fiber material floor	98.63 ms
Engineering floor (5% path allowance)	104 ms
Research 1.33× mapped-fiber reference	131.71 ms
Estimated unamplified path loss	2123.7 dB
Transparent optical spans / inline amplifiers	133 / 132
Published RTT inflation over fiber floor	2.06×

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	194.59 ms
Average RTT	203.8 ms
Maximum RTT	241.85 ms
Standard deviation	8.55 ms
Stdev / average	4.2%

Estimated RTT trend

Modeled comparison, not historical probe measurements.

Average: 204.0 ms
Minimum: 201.5 ms
Maximum: 205.7 ms
Average loss: 0.04%

Route Context

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

Reverse direction

Tokyo to Marseille latency and RTT: 205.6 ms

Fastest routes departing Marseille (MRS)

Marseille to Paris latency and RTT: 8.9 ms
Marseille to Frankfurt latency and RTT: 16 ms
Marseille to London latency and RTT: 18.9 ms
Marseille to Amsterdam latency and RTT: 20.3 ms
Marseille to Berlin latency and RTT: 20.6 ms

Fastest routes arriving at Tokyo (TYO)

Taipei to Tokyo latency and RTT: 31.9 ms
Hong Kong to Tokyo latency and RTT: 44.9 ms
Singapore to Tokyo latency and RTT: 68.9 ms
Seattle to Tokyo latency and RTT: 85 ms
Los Angeles to Tokyo latency and RTT: 101.2 ms

Same corridor (Europe → Asia Pacific)

Moscow to Hong Kong latency and RTT: 118.6 ms
Moscow to Taipei latency and RTT: 132.1 ms
Marseille to Singapore latency and RTT: 139.6 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/mrs-tyo.pings.{csv,json,yaml}. Cite the route, round timestamp and dataset version. Example: "Hats Network latency dataset, Marseille → Tokyo 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.

Marseille, France → Tokyo, Japan RTT