Japanese woodworking becomes very much more enjoyable when you embrace the traditional Japanese shaku measuring system. It's similar to the benefits of learning a language but there are only three words to learn.
From imperial
The base unit is a shaku (about a foot) which is divided into ten sun (chubby inch), each of which is divided into ten bu (about an eighth). So boards are still 8 by 4, two by fours still aren't, and you can carry on working in eighths but now you've got ten of them.
From metric
Your 300mm rule is now called a 'shaku', divided into ten 30mm parts called 'sun', subdivided into 'bu' of 3mm each. If you get lost, just multiply by three and everything goes back to normal.
The Japanese govenment tried to ban shaku and force carpenters to use metres; the carpenters responded by adopting the metre, dividing it by 33 and carrying on, hence shaku rules either have no markings or the markings are 1/33m rather than 1 sun.
Heavy Duty
Hard Chrome Matt Finish
Graduations on every edge
Made in Japan
