IZPorn.net knows what a good JAV porn tube means. It shares a lot of SD and HD JAV videos. If you don't know what JAV is, I will tell you. It is an abreviation of the "Japanese Adult Video" industry. If you don't trust my word, look for it in the UrbanDictionary. They will tell you the same thing. In fact, my explanation is a copy / paste from there. Lol!
The homepage will start with their latest additions. Every new update (updates are done on a daily basis) has a thumbnail, a title, a rating and the number of views. Unfortunately, you will not have a preview on posts. The sidebar will show you a cloud for tags that you can use in order to see similar videos. Underneath, you will have a section for Recent Posts. If you are looking for something specific and you know japanese keywords, use the search box that can be found in the header.
IZPorn is not a fancy porn tube, but I think that they never intended to be so. All they want is to share a lot of quality JAV videos from sites like Heyzo, Tokyo Hot, Caribbean, etc and in my opinion, they are doing a great job.