• USD/JPY climbs toward day's high as S&P 500 rises after US market open

• Surge in yen futures volume suggests algos, market rolls may be a factor

• Follows Fin Min Kato comments on FX stability, tariffs and supply chains

• Options expiring Monday at 149 and offers may slow ascent toward 21-DMA

• Resist: 149.10-20 day's and March 12 highs; 149.28 21-DMA, 149.40 Feb 20 low

• Supp: 147.78 March 12 inv. hammer low; 146.94 March 7 low; 146.52 Oct 2 high
Yen

(Robert Fullem is a Reuters market analyst. The views expressed are his own.)