The Japanese 4 in 1 pattern is one of the easier chainmail patterns to learn. However,
keep in mind that connecting links to the wrong row is a common thing to find oneself
doing.
Link Considerations
I'd recommend not using larger than 1/4" ID, especially if the maile is going to
be resting against a surface. Otherwise, consider forming the links which will not be
sitting flat as ovals.
Tips
This pattern hangs in a square and can be combined with the Japanese 6 in 1 pattern to
provide an alternative angle. It is not very effective when pulled flat against a surface.
However, it makes an attractive draping piece. I have often thought that it would be fun
to make chainmail curtains out of this pattern. However, it would take much more time than
I can currently spare.
When beginning to work with both Japanese patterns, it's much easier if you hang the
piece up because you'll be better able to see that the links are hanging correctly.
Starting the Pattern
Make lots of 1 on 1 chain. The beginning length (top row) should be as long as the top
of the item you are planning. From this, even lengths of chain should be hung from the
bottom of every other link. The columns should be about as long as the height of the item.
When hanging the chain, make sure that you don't twist the top row.
The Connections
Placing the connecting links on the correct side of each flat link can be tricky. Shift
your focus to the third row down on each column. Add a link between the first two rows,
making sure that the links above are falling straight. It is easier to keep track of after
the first connection. Move to the second column where you just connected one side of that
link. Add a link between the other side and the next column's third link. Complete the
rest of that row the same way.
Continuing On
From here you just move to the fifth row, connecting each column. Then do the seventh
row and so on. Simple, right? Once you get used to the pattern, you should be able to work
on it without hanging it up.