Japan
The Netflix ISP Speed Index is a measure of prime time Netflix performance on particular ISPs (internet service providers) around the globe, and not a measure of overall performance for other services/data that may travel across the specific ISP network.
ISP Leaderboard - January 2019
| Rank | ISP | Speed Mbps | Previous Mbps | Rank Change | Type | |
|---|---|---|---|---|---|---|
| 1 | au Hikari (KDDI) | 4.38 | 4.36 | No change |
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| 2 | Softbank - Fiber | 4.09 | 4.08 | No change |
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| 3 | UCOM | 3.80 | 3.79 | No change |
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| 4 | eo Hikari (K-Opticom) | 3.77 | 3.74 | No change |
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| 5 | iTSCOM | 3.62 | 3.59 | +1 |
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| 6 | So-net | 3.60 | 3.62 | -1 |
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| 7 | Tokai Communications | 3.58 | 3.57 | No change |
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| 8 | IIJ | 3.57 | 3.55 | +1 |
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| 9 | OCN (NTT Com) | 3.57 | 3.56 | -1 |
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| 10 | J:COM | 3.48 | 3.47 | No change |
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| 11 | Asahi Net | 3.42 | 3.43 | No change |
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| 12 | VECTANT | 3.41 | 3.42 | No change |
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| 13 | BIGLOBE | 3.37 | 3.38 | No change |
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| 14 | KDDI Cable/DSL/Wireless | 2.81 | 2.82 | +1 |
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| 15 | NIFTY | 2.79 | 2.94 | -1 |
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| 16 | NTTPC InfoSphere | 2.79 | 2.80 | No change |
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| 17 | Softbank - DSL | 2.28 | 2.26 | +1 |
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| 18 | Freebit | 2.08 | 2.30 | -1 |
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