Please be informed that, Mr. Yoshimi's children, Tsubasa & Sayaka, there passports shall be valid until 11 August 2015, by the Immigration new regulations, in extension on December 2015 there visa shall be extended up to 11 August 2015 (instead of one-year up to 3 January 2016), and after they obtain of new passports, they have to submit new applications for visa extension (and other related documents) together with paying again of extension fee of Baht 1,900 each.
The above are difference from the previous rules that, they can just submit of visa transfer letter and shall get visa extension up to 3 Jan 16 with no need to pay extension fee again.
If they can obtain of new passports before the extension on Dec 14, there visa shall be extended up to 3 January 16.