Japan's equities market concluded Wednesday's session on a higher note, with the Nikkei 225 share average snapping a three-day losing streak to log its first advance in four sessions.

The benchmark Nikkei settled up 0.69%, or 437 points, at 63,923.00 points, staging a solid recovery from early lows. The broader TOPIX index also followed suit, closing 0.61% higher at 4,061.72 points. The standout performers on the day were energy producers and commodity-related stocks, which delivered robust gains throughout the session on the back of a continued surge in international crude oil prices, serving as the primary engine for the market's rebound.

However, the double-edged sword of elevated oil prices for the Japanese economy was laid bare in the latest economic indicators released today. Exports climbed 19.3% year-on-year in August, underscoring the resilience of overseas demand. Yet, import values skyrocketed by 28% year-on-year, largely driven by ballooning energy import costs. After netting these out, Japan's monthly trade deficit reached 1.106 trillion yen (approximately $75 billion), highlighting the severe strain that imported inflation is placing on the nation's current account balance.

Despite today's uptick, investor sentiment remained tense as a packed 'super central bank week' looms large. Wall Street extended its decline overnight, weighed down by rising Treasury yields, debt concerns, and a spike in oil prices, which capped risk appetite across Asian markets. With two major central banks set to announce their policy decisions, market participants were largely in a wait-and-see mode.

The U.S. Federal Reserve is slated to unveil its policy decision later on Wednesday, with broad expectations pointing to a rate hike. Meanwhile, the Bank of Japan is set to conclude its two-day monetary policy meeting on Friday, with market consensus leaning toward a likely rate increase given persistently high inflation.

Analysts noted that ahead of the policy verdicts from both the Fed and the BOJ, the strength in energy shares appears more attributable to sector rotation and a spillover from commodity price movements, suggesting that the Japanese market is likely to remain highly volatile in the near term.