Japanese crosswords is a logic puzzle. You are given a gray grid with numbers along its sides and have to fill it in in order to paint a black-and-white picture. The game is an ultimate challenge for brain-twisters lovers - it's very challenging and addictive. It may take some time before you learn how to do these crosswords, and much more time to master this game, but the results achieved are worth all the efforts.
Each number you see at the top or left side of the grid represents the number of adjoining black squares within that row or column. Between the black blocks must be at least one white cell.
Look for the longest blocks first: any block that is longer than half of a row, will definitely have some black cells in the middle, no matter where it starts.
Then look for the rows or columns that contain only one painted cell and try to identify that cell.
When you definitely see that there are no more painted blocks in a row or column, mark all the free cells white.