Now you can test your Japanese language ability online using the website of Tokyo University International Center.
The test is aimed towards students who wish to enroll and take courses at the International Center of Tokyo University. Yet, as the test measures general Japanese knowledge, you can use it to know your level too. The test is professionally prepared and covers the most essential parts for each level, while the last three questions of each level measures your listening ability and how much you can understand conversational Japanese.
Give it a try, and tell us your result, either to congratulate you or cheer you up and help you continue.