1. Bank of Japan raises policy rate to a three-decade high of 0.75%. 2. Japan's inflation has exceeded the 2% target for 44 months. 3. GDP contraction of 0.6% indicates economic fragility amid rate hikes. 4. Weak yen and high debt-to-GDP ratio strain Japan's economy. 5. A $135.5 billion stimulus package aims to assist inflation-hit consumers.