The Silver Arrows have brought new aerodynamic parts to Suzuka as they look to maintain a winning run in Japan that began in the first year of the V6 Hybrid regulations.
Mercedes also stemmed Ferrari's three-race winning run last time out in Russia, although the Scuderia were the fastest team across the weekend, putting extra focus on Mercedes' upgrade on a weekend that they can secure a sixth straight constructors' title.
"We have a pretty solid update package this weekend," Bottas said. "Obviously [it is] getting a try-out tomorrow, but in theory yes, it should give us more performance, how much is something we'll find out.
"We have some rough numbers about it, but should be a decent step, in terms of upgrade packages so far.
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