I’ve owned a few Aikido weapons bags over the years. The first few were pretty crappy (as were the bokken and jo). They were basically slip bags that were made of poorly stitched together low-quality fabric with no reinforcements. The last one I owned was just ridiculous. The stitching on the shoulder strap fell apart. So, I had to carry the bag (and weapons, of course) in my hand. And the weapons actually put a hole in the bottom of the weapons bag. So, I had to carry it upside down.
About three years ago, I decided I’d been doing Aikido long enough that it was time to get serious about my training equipment. So, I bought an L5 jo, bokken and tanto from Kingfisher (which are awesome, by the way). Along with them, I picked up the Kingfisher weapons carrying case. It’s a good weapons bag. The fabric is thick and seems durable. The strap is solidly stitched. And the bottom of the bag is reinforced with leather. I’ve been using it for nearly three years and it still looks like new.
The one they’re selling now is a Two Trees Design weapons bag that is actually a little better than the one they were selling three years ago. I like the zippers, and the black, in my opinion, looks cooler than my green one.