Logitech Cordless Keyboard for Wii
The Logitech Wireless Keyboard for Wii is a keyboard that's made specially for Wii. It communicates with the Wii with a wireless dongle. It was released in the US, Germany and Japan (under the Logicool brand, the Japanese name for Logitech).
The Japan version of the keyboard also came in a Monster Hunter Tri version, but it seems that the keyboard is the same - just the packaging is different and it came with a special Monster Hunter-themed bag.