Interest Rate Expectations: Changes in expectations regarding future interest rate movements by the Bank of Japan heavily influence the bond's price. Anticipated rate hikes typically decrease bond prices, while expected rate cuts increase them.

Inflation Outlook: Rising inflation erodes the real value of fixed-income assets. Higher expected inflation usually leads to lower bond prices, as investors demand a higher yield to compensate for the reduced purchasing power.

Economic Growth: Strong economic growth often leads to expectations of higher interest rates, which can negatively impact bond prices. Conversely, a slowing economy may lead to lower rates and higher bond prices.

Global Market Sentiment: Global events and market sentiment can affect demand for Japanese government bonds (JGBs). Risk-off sentiment may increase demand for JGBs as a safe haven, pushing prices up, while risk-on sentiment may reduce demand, lowering prices.

Government Fiscal Policy: Changes in government spending and borrowing can influence the supply of JGBs, affecting prices. Increased government borrowing could increase bond supply, potentially lowering prices.