Here's what Tanglewood say about the TUJ4 Java Series Concert Ukulele:

Building on the established global success of the Tanglewood Ukuleles, this Tanglewood TUJ4 Java Concert Size Ukulele is part of the exciting range of premium, uniquely featured high grade Java series Ukuleles by Tanglewood, designed for the most professional and aspiring of musicians.

As the name signifies, manufactured for the most part using genuine Java Koa, with every single instrument featuring Solid Timber soundboards and Concert size scale lengths, this Tanglewood TUJ4 Java Concert Size Ukulele exudes a confidence in both manufacturing detail and material provenance that players of Tanglewood Ukuleles have come to expect.