Tokyo to Marseille ICMP RTT measurement: average latency, jitter, packet loss, route distance, and stability data for Japan-France connectivity.

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

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

The 50 ICMP echo probes in round 2026-08-15T04:03:13Z recorded an average 206.7 ms round-trip time from Tokyo to Marseille, with replies between 199.61 ms and 226.7 ms and a packet loss rate of 0%.

For the 19 outbound routes measured from Tokyo in this round, Marseille ranked 17th, putting it at the slower end of the set. Its standard deviation of 6.28 ms is about 3.0% of the average, slightly below the network median ratio of 3.08%, indicating a steadier pattern than the route set as a whole.

The great-circle distance is 10,112.8 km, and the theoretical fiber floor is 99.03 ms; the measured average is 2.09 times that floor, or 47.9% fiber efficiency. Despite the long absolute delay, jitter of 4.42 ms is modest, and a max-min swing of roughly 27.1 ms suggests the path is reasonably stable during the sample window.

Latency Summary

Metric	Value
RTT	206.7 ms
Jitter	4.42 ms
Packet Loss	0%
Standard Fiber Floor	99.03 ms
Fiber Efficiency	47.9%
Latency Tier	Fair
Source Region	Asia Pacific
Destination Region	Europe

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: TYO → MRS

50 ICMP echo samples at 100 ms intervals · round 2026-08-15T04:03:13Z · avg 206.7 ± 0.89 ms (SE)

Sample distribution: box = interquartile range (202.4–208.2 ms), median 204.4 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 (99.0 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	202.63
2	100	205.11
3	200	202.13
4	300	201.41
5	400	200.34
6	500	199.61
7	600	202.40
8	700	201.80
9	800	202.86
10	900	202.04
11	1000	202.44
12	1100	206.07
13	1200	205.80
14	1300	204.98
15	1400	203.48
16	1500	204.48
17	1600	217.63
18	1700	208.06
19	1800	203.87
20	1900	203.30
21	2000	203.72
22	2100	204.38
23	2200	200.99
24	2300	200.21
25	2400	215.76
26	2500	206.50
27	2600	213.24
28	2700	215.29
29	2800	204.83
30	2900	208.24
31	3000	226.70
32	3100	214.95
33	3200	212.98
34	3300	206.75
35	3400	204.92
36	3500	204.22
37	3600	211.23
38	3700	218.20
39	3800	207.13
40	3900	204.35
41	4000	201.34
42	4100	201.54
43	4200	211.57
44	4300	222.64
45	4400	218.82
46	4500	207.54
47	4600	203.24
48	4700	202.46
49	4800	200.60
50	4900	200.22

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 Tokyo (35.68950, 139.69171) and Marseille (43.29695, 5.38107). It does not disclose either facility address.

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	2.09×

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	199.61 ms
Average RTT	206.7 ms
Maximum RTT	226.7 ms
Standard deviation	6.28 ms
Stdev / average	3.0%

RTT trend

Estimated route stability across the selected time window.

Average: 206.7 ms
Minimum: 204.3 ms
Maximum: 208.7 ms
Average loss: 0.01%

Route Context

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

Reverse direction

Marseille to Tokyo latency and RTT — 206 ms

Fastest routes departing Tokyo (TYO)

Tokyo to Taipei latency and RTT — 32.1 ms
Tokyo to Hong Kong latency and RTT — 45.6 ms
Tokyo to Singapore latency and RTT — 69.6 ms
Tokyo to Seattle latency and RTT — 84.6 ms
Tokyo to Los Angeles latency and RTT — 101.5 ms

Fastest routes arriving at Marseille (MRS)

Paris to Marseille latency and RTT — 8.9 ms
Frankfurt to Marseille latency and RTT — 17.2 ms
Amsterdam to Marseille latency and RTT — 19.7 ms
Berlin to Marseille latency and RTT — 20.5 ms
London to Marseille latency and RTT — 24.9 ms

Same corridor (Asia Pacific → Europe)

Hong Kong to Moscow latency and RTT — 116.6 ms
Taipei to Moscow latency and RTT — 131.7 ms
Singapore to Marseille latency and RTT — 138.8 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/tyo-mrs.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Tokyo → Marseille 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.

Tokyo, Japan → Marseille, France RTT