Bambu Bambu brand guitar. Built by a Japanese company called Misato. The neck-thru laminations are made from bamboo.

Back in the mid 1970s the R&D Group from the Misato parent company, Chushin consulted with Alembic luthiers in USA about building a guitar using bamboo as a primary component, a conventional 2 pickup neck-thru-the-body instrument using lamination techniques developed and proven by Alembic. In 1978 the first production run ended after about 20 instruments had been built. [Source: a6string]

Images Bambu guitar with active pickups courtesy Markus Fuchs, Switzerland:

Bambu guitar flyer at Alembic forum