This article covers 【リチャージWiFi】日本100GB+世界3GB 365日 ギガ付 ポケット WiFi 海外利用可能 月額 0円【T8BK-100GB.

Overview

The Recharge WiFi T8BK-100GB/365 Day is a prepaid mobile router that requires no contract or monthly fees. It comes with 100GB of domestic data (valid for one year) and 3GB of international data out of the box. Weighing just 100g and offering up to 15 hours of battery life, it’s designed for on-the-go use such as telework, travel, and in-car connectivity.
The device supports Japan’s three major carriers (docomo, au, Softbank) for wide coverage, and supports Wi-Fi 6 (802.11ax) with a maximum download speed of 150 Mbps (best-effort). Additional data can be purchased via the official website or app, with support for credit cards, online retailers Pay, and convenience store payments.

Connectivity & Compatibility

The Recharge WiFi can connect up to 8 devices simultaneously, including smartphones, tablets, laptops, and game consoles. It supports wireless standards 802.11ax (Wi-Fi 6), 802.11b/g/n. Security uses WPA2-PSK, providing standard wireless protection.
The router has a USB-C port for charging (USB cable included). The built-in battery can also be charged from a power bank. Since the device is SIM-free and works with the three major Japanese networks, you can simply power it on and start using it right away.

Product Info

The Recharge WiFi T8BK-100GB/365 Day is a budget-oriented mobile router released around 2024. It retails for approximately ¥12,980 (Japanese online retailers reference price). The manufacturer provides a one-year warranty and a support hotline. Included in the box are a USB cable and a quick start guide.
Market positioning: entry tier. Unlike typical mobile routers that require a monthly subscription, this product is a one-time-purchase model that includes data for a full year. Competitors include Rakuten Mobile’ pocket WiFi and prepaid SIM + router combos, but the Recharge WiFi stands out by eliminating contracts and recurring payments entirely.

Best Use Cases

Frequent travelers and business commuters: If you travel domestically a few times a year or take an overseas business trip, the included 100GB domestic + 3GB international data eliminates the need to rent a pocket WiFi or swap SIM cards. The device works immediately upon arrival.
Teleworkers and in-car users: It’s ideal for connecting a laptop or tablet at a café, co-working space, or in a car. The compact size and light weight make it easy to carry. However, because it’s best-effort, speeds may drop during peak hours or in weak signal areas.
Short-term visitors or returnees: Tourists or expats on a temporary return to Japan will appreciate the no-contract, SIM-free design. The one-year validity means you can keep using it even after returning home for a while.
People who want to avoid monthly fees: Students, freelancers, or anyone on a tight budget can start using mobile data with just a single upfront payment. Additional data can be purchased without a credit card, offering flexibility.

Product Disclosure (Amazon)

  • Manufacturer: リチャージWiFi
  • Seller: 【リチャージモバイル公式】カウスメディアStore
  • Fulfilled by: Amazon
  • ASIN: B0DF7JGFYN
  • Note: This article covers a manufacturer-made product based on Amazon listing details.