Tokyo, Japan to São Paulo, Brazil ICMP RTT measurement: 229.4 ms average, 0% packet loss, Fair tier, with route efficiency context.

🇯🇵 Tokyo, Japan (TYO) → 🇧🇷 São Paulo, Brazil (GRU)

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

During the 2026-08-15T04:03:13Z round, 50 ICMP echo round-trip samples from Tokyo to São Paulo averaged 229.4 ms, with a minimum of 220.09 ms and a maximum of 250.17 ms. No packets were lost, and the 8.06 ms jitter value stayed small relative to the average, consistent with the Fair latency tier.

The Tokyo–São Paulo geodesic distance is 18,530.2 km, placing the vacuum floor at 123.62 ms and the direct-fiber floor at 181.46 ms. At 229.4 ms, the route runs 1.26 times above the fiber floor, or about 79% of direct-fiber efficiency—a strong result for an intercontinental path of this length.

This route ranked 18th among the 19 outbound routes from Tokyo in the same measurement set, which makes sense given the distance. Its relative standard deviation—7.68 ms on a 229.4 ms average, roughly 3.3%—is close to the 3.08% median variability across the route set. The main story is a long but stable path: high absolute latency, zero loss, and no sign of erratic variation in this sample.

Latency Summary

Metric	Value
RTT	229.4 ms
Jitter	8.06 ms
Packet Loss	0%
Standard Fiber Floor	181.46 ms
Fiber Efficiency	79.1%
Latency Tier	Fair
Source Region	Asia Pacific
Destination Region	South America

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 → GRU

50 ICMP echo samples at 100 ms intervals · round 2026-08-15T04:03:13Z · avg 229.4 ± 1.09 ms (SE)

Sample distribution: box = interquartile range (224.0–233.8 ms), median 226.8 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 (181.5 ms) for this route.

Full 50-sample dataset

Seq	Offset (ms)	RTT (ms)
1	0	238.48
2	100	226.01
3	200	226.08
4	300	236.56
5	400	234.47
6	500	231.86
7	600	226.94
8	700	246.50
9	800	228.28
10	900	226.57
11	1000	250.17
12	1100	230.42
13	1200	222.68
14	1300	220.54
15	1400	231.39
16	1500	228.93
17	1600	225.55
18	1700	223.92
19	1800	221.19
20	1900	222.19
21	2000	224.71
22	2100	228.58
23	2200	227.22
24	2300	246.55
25	2400	234.67
26	2500	229.64
27	2600	224.59
28	2700	220.16
29	2800	235.91
30	2900	224.07
31	3000	238.01
32	3100	226.15
33	3200	242.20
34	3300	247.96
35	3400	228.98
36	3500	222.21
37	3600	224.90
38	3700	223.24
39	3800	238.68
40	3900	225.59
41	4000	222.03
42	4100	225.45
43	4200	222.15
44	4300	222.25
45	4400	238.30
46	4500	226.07
47	4600	229.79
48	4700	222.84
49	4800	220.09
50	4900	228.28

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 São Paulo (-23.54750, -46.63611). It does not disclose either facility address.

Physical Reference	Value
WGS-84 geodesic distance	18,530.2 km
Vacuum RTT floor	123.62 ms
Standard fiber RTT floor ( $n_g=1.4679$ )	181.46 ms
Low-latency fiber material floor	180.73 ms
Engineering floor (5% path allowance)	190.56 ms
Research 1.33× mapped-fiber reference	241.34 ms
Estimated unamplified path loss	3891.3 dB
Transparent optical spans / inline amplifiers	244 / 243
Published RTT inflation over fiber floor	1.26×

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	220.09 ms
Average RTT	229.4 ms
Maximum RTT	250.17 ms
Standard deviation	7.68 ms
Stdev / average	3.3%

RTT trend

Estimated route stability across the selected time window.

Average: 229.7 ms
Minimum: 227.0 ms
Maximum: 231.4 ms
Average loss: 0.01%

Route Context

Departure PoP: Tokyo (TYO)
Destination PoP: São Paulo (GRU)
Region overview: Asia Pacific → South America
Corridor overview: Asia Pacific to South America
Full global matrix: Backbone Latency Matrix
Physical methodology: Theoretical Fiber Latency

Reverse direction

São Paulo to Tokyo latency and RTT — 229.6 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 São Paulo (GRU)

Ashburn to São Paulo latency and RTT — 102.6 ms
New York to São Paulo latency and RTT — 108.3 ms
Miami to São Paulo latency and RTT — 129.9 ms
Los Angeles to São Paulo latency and RTT — 131.1 ms
Seattle to São Paulo latency and RTT — 155.1 ms

Same corridor (Asia Pacific → South America)

Taipei to São Paulo latency and RTT — 275.8 ms
Hong Kong to São Paulo latency and RTT — 288.8 ms
Sydney to São Paulo latency and RTT — 298 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-gru.pings.{csv,json,yaml}. When citing, include the route, the measurement round timestamp, and the dataset version — for example: "Hats Network latency dataset, Tokyo → São Paulo 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 → São Paulo, Brazil RTT