The Japanese PlayStation Plus is a treasure chest offering games like Shadow of the Colossus HD, White Knight Chronicles 2 and a whopping 123 PlayStation classics, and the best news is that Sony Computer Entertainment Japan and Asia just announced the Plus Autumn Festival, that offers 15 days of free access to every Japanese PSN account.

It's worth mentioning that if you don't care for this month's free games (you can see a full list here and here), the offer will be available until February the 3rd, so you can just bookmark this page and come back at a later time.

Want to know how to get it? It's fairly easy.

First of all you need to create a Japanese PSN account. If you don't already have one Kotaku has a very good guide on how to do it, so I won't repeat every single step. Just follow the instructions here.

Once you have the Japanese account ready you can go to this link and follow the instructions in the pictures below.

After the step above it may ask you to confirm. If it does just click on "はい" (Yes). If you've done everything right, near your nickname on the top right of the screen now you'll have the familiar PS Plus Icon.

Now it's time to go nab some games. You can do so on your PS3 following the instructions below. Enjoy!