The EIKEN or STEP test (英語検定 or eigo kentei) is very popular in Japan, especially as students pay discounted fees for the test. The test consists of reading, listening, speaking, and writing portions.
The test is largely focused on vocabulary and grammar. The five levels of the test correspond with 7th grade (beginner junior high), 9th grade (advanced junior high), 12th grade (high school), college, and professional-level.
Test and practice materials are available at the official EIKEN website.