Indonesia to Japan plug adapter: plugs and voltage compared

No. The Indonesia Ministry of Tourism names Type C and F (round pins) for Indonesia. Japan's outlets take Type A plugs with two flat pins (JNTO), so bring a plug adapter to Type A. Japan runs on 100V and Indonesia on 230V.

Updated October 3, 2026

230Vin Indonesia

50Hzin Indonesia

640,577visitors from Indonesia in 2025

Plug adapter needed

Indonesia and Japan side by side

Indonesia: 230V and 50Hz. Japan: 100V, 50Hz in the east and 60Hz in the west.

Voltage, frequency and plug in Japan and Indonesia (official pages, checked 2026-10-03)
	Japan	Indonesia
Voltage	100V JNTO	230V Indonesia Ministry of Tourism
Frequency	50Hz east, 60Hz west JNTO	50Hz Indonesia Ministry of Energy and Mineral Resources
Plug	Type A, two flat pinsPanasonic lists Type A and B JNTO	Round pins (Type C and F) Indonesia Ministry of Tourism

Who says what about electricity in Indonesia

Official sources for voltage, frequency and plug in Indonesia, and what each one states
Source	What it states	Kind
Indonesia Ministry of Energy and Mineral ResourcesRegulation No. 20/2020 (grid code)	Frequency: 50Hz Source	Government
Indonesia Ministry of TourismPlugs and electricity	Voltage: 230V; frequency: 50Hz; plug: Type C, F Source	Tourism board

What to pack in Indonesia for Japan

Round pins from Indonesia need a Type A adapter in Japan.

Round pins: a plug adapter to Type A. Source: Indonesia Ministry of Tourism.
Each device from Indonesia: read INPUT. 100-240V covers Japan's 100V; 230V alone needs a voltage converter (JNTO).
Indonesia: 50Hz. Tokyo: 50Hz. Osaka: 60Hz. A 50/60Hz label covers all three.

Why Indonesia is grouped with round pins: The Seoul Tourism Organization writes “the C and F types, which have two round holes”.

Flow chart for travellers from Indonesia: does the plug have two flat pins, and does INPUT include 100V? If not, bring a plug adapter or a voltage converter.

Figure by japan-japan.com from JNTO: Plugs and Electricity.

What official pages in Indonesia say

3 statements from the Indonesia Ministry of Tourism and the Indonesia Ministry of Energy and Mineral Resources.

Indonesia Ministry of TourismThe standard voltage throughout Indonesia is normally 230 V and with a standard frequency of 50 Hz.Plugs and electricity

Indonesia Ministry of TourismMost power plugs and sockets in Indonesia are type C and F. This plug is the 2 pin socket and plug design which is the standard European plug.Plugs and electricity

Indonesia Ministry of Energy and Mineral ResourcesFrekuensi nominal di jaringan yaitu 50,00 (lima puluh koma nol nol) Hz.Regulation No. 20/2020 (grid code)

In English: The nominal frequency of the network is 50.00 Hz.

Visitors from Indonesia in 2025

Indonesia ranked 12th among countries and regions, with 640,577 visitors to Japan in 2025 (JNTO, final figures).

Visitors in 2025: 640,577
Rank: 12th
Share of all visitors: 1.5%
Change from 2024: +23.7%

Frequently asked questions

Do I need a plug adapter in Japan from Indonesia?

No. The Indonesia Ministry of Tourism names Type C and F (round pins) for Indonesia. Japan's outlets take Type A plugs with two flat pins (JNTO), so bring a plug adapter to Type A.

Is Japan's voltage the same as Indonesia's?

No. Japan uses 100V (JNTO); Indonesia uses 230V, according to the Indonesia Ministry of Tourism.

Do I need a voltage converter in Japan from Indonesia?

Only for devices rated for 230V alone that are not dual-voltage (JNTO). A charger from Indonesia marked 100-240V needs none.