Beware: au Handsets with UP browser 6.2 cannot display progressive jpegs. By default Photoshop CS3 will save jpegs as progressive, other software may do so as well.
- depend on handset, but you can consider a width of 220px to be safe.
- docomo has more or less standardized on 240 px for the browser
- au has various sizes from 228px to 240 px
SoftBank has 2 major categories, the 230-240px and the large 468-480px browsers
By specifying the image width and height inside the img tag, you can about double the page rendering speed on all carriers
- One large image will render faster than many small images. This effect is worst on docomo and softbank.
Some ASP transcoding services that support Japanese handsets.
Fujifilm has complete solutions