An architect facing mounting public criticism for fabricating quake-resistance data for 20 condominium buildings and a hotel in the Tokyo area has said he was only serving his clients' needs for speedy and inexpensive construction plans.

"It's not entirely my fault," Hidetsugu Aneha, 48, told reporters in front of his home and office in Ichikawa, Chiba Prefecture, on Friday.

He argued that if entities tasked with checking the data had done their job properly, the documents would never had been cleared in the first place.