Usd/jpy - 91.24 ... The greenback retreated in pre-holiday thin trade n investors are focusing on a series of U.S. Treasury auctions next week to see how well the supply can be absorbed. The Treasury Dept. will sell a total $113 billion of 2-yr, 5-yr n 7-yr notes in its final debt issuance of the year. Offers by Japanese exporters are tipped at 91.50, 91.70/75 n further out at 91.85/90. On the downside, bids are located at 91.05/10 with stops building up below 91.00.