This article covers カシムラ(Kashimura) SIMフリー無線LANルーター USB電源タイプ 4G (ブラック) NKD-249 (× 3).

Overview

The Kashimura NKD-249 is a USB-powered 4G LTE mobile router designed primarily for in-vehicle Wi-Fi use. Sold as a 3-pack, each unit weighs just 90 grams and supports download speeds up to 150 Mbps and uploads up to 50 Mbps. It works with SIM cards from docomo, au, SoftBank, and Rakuten, as well as various MVNOs, making it carrier-agnostic. The router automatically turns on and off with the vehicle's ignition, providing a hassle-free hotspot for up to 10 devices.

Connectivity & Compatibility

The NKD-249 connects via USB power (5V/1A or higher), so it can be powered by any standard USB port in a car or from a portable battery. It accepts standard 4G LTE SIMs from Japan's major carriers and MVNOs. Wi-Fi is based on 802.11 b/g/n (2.4 GHz only), which is sufficient for browsing and streaming but not for low-latency gaming. Up to 10 clients can connect simultaneously. The front LED indicates network status and signal strength. Most Wi-Fi-enabled devices such as laptops, smartphones, tablets, and gaming consoles are compatible.

Product Info

The Kashimura NKD-249 was introduced around 2024 and is widely available on Japan. The 3-pack retails for approximately ¥21,459 (as of this writing). Each unit comes with a USB cable; no SIM card is included. Warranty details are handled by the seller. Market positioning is entry-to-midrange: it trades top speed and advanced features for simplicity and SIM flexibility, making it ideal for dedicated car use.

Best Use Cases

Drivers wanting an always-ready car hotspot: The ignition-linked auto power-on/off means no manual toggling. Perfect for long trips or car camping where multiple passengers need connectivity. However, it requires a USB port that only powers on when the engine is running. Budget-conscious users with MVNO SIMs: Since the router supports all major Japanese carriers, you can pick the cheapest data plan that suits you. SIM cards are not included, so factor that into your total cost. Outdoor enthusiasts needing temporary Wi-Fi: Compact and USB-powered, this router works with power banks, enabling a hotspot at campsites or remote work spots. Speed and reliability depend on local signal strength, so don't expect high bandwidth. Multi-vehicle households: With three units in a pack, you can equip multiple cars or keep a spare. Each unit is identical, so you may want to label them to avoid confusion.

Product Disclosure (Amazon)

  • Manufacturer: カシムラ(Kashimura)
  • Seller: Amazon.co.jp
  • Fulfilled by: Amazon.co.jp
  • ASIN: B0H8SQKFVN
  • Note: This article covers a manufacturer-made product based on Amazon listing details.