Japan general-environment limit, 300 MHz–1.5 GHz
f/1500 mW/cm² (f in MHz) — 6 W/m² at 900 MHz, the band that carries most 2G/3G/4G downlink in Japan.
Regulatorygeneral public300 MHz–1.5 GHz
Last verified 12 August 2026.
- Limit value
- 2,000,000–1 × 10^7 µW/m²Regulatory value — legally enforceable — The range is the band edges: 0.2 mW/cm² (2 W/m²) at 300 MHz to 1 mW/cm² (10 W/m²) at 1.5 GHz. At 900 MHz the limit is 0.6 mW/cm² = 6 W/m², equivalently E = 1.585 √900 = 47.6 V/m.sources: japan-radio-law-table
- Quantity
- power density
- Frequency band
- 300 MHz–1.5 GHz
- Population
- general public
- Set by
- Japan Radio Radiation Protection Guidelines (電波防護指針) (Radio Radiation Protection Guidelines 1990/1997; enforced through 電波法施行規則 art. 21-3 and appended table 2-3-2 (as amended 2017))
- Kind
- Regulatory — legally enforceable
- Averaging time
- 6 minutesA measurement must use the same averaging before it can be compared with this value.
- Frequency-dependent formula
- f/1500 mW/cm² (f in MHz), E = 1.585 √f V/m
Related records
- Japan Radio Radiation Protection Guidelines (電波防護指針)
Japan's radio-wave protection values, made binding by the Radio Law Enforcement Regulations: 27.5 V/m from 30 to 300 MHz and 61.4 V/m above 1.5 GHz for the general environment, six-minute averaged.
Standards & frameworks
- Macro cell tower (LTE / 5G sector antenna)
Sector antennas radiate on the order of 1000 W EIRP per sector on the main beam, which is aimed above and away from the tower base — ground-level exposure directly beneath a tower is usually lower than at a few hundred metres away.
Sources & emitters
Sources
- japan-radio-law-table 電波法施行規則 第21条の3 および別表第2号の3の2 — 電波の強度の値 (Radio Law Enforcement Regulations, art. 21-3 and appended table 2-3-2: permitted radio-wave field strengths) — 総務省 電波利用ポータル (Ministry of Internal Affairs and Communications, Japan). regulation, link checked 2026-08-12.
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