Yamato Transport Co. filed an appeal Wednesday with the Tokyo High Court against a lower court's dismissal of its request that Japan Post stop the parcel delivery service it's offering in a tieup with Lawson Inc.
On Jan. 19, the Tokyo District Court rejected Yamato's claim, filed in September 2004, that the Japan Post service poses unfair competition.
Yamato is the core unit of Yamato Holdings Co.
The district court ruled Japan Post is not charging prices below cost because the growth of its delivery service has not pushed it deeper into the red.
Yamato recorded higher sales and profits even after Japan Post lowered its service charges, so the postal service is not growing at Yamato's expense, the district court said.