TOKYO (AP) — Japan’s Prince Hisahito is the first male royal to reach adulthood in 40 years. Many people in Japan worry he could be the last.The elaborate palace rituals to formally recognize Hisahito as an adult on Saturday are a reminder of the bleak outlook for the world’s oldest monarchy. Much of this comes down to its male-only succession policy and dwindling numbers.Hisahito is second in line to the Chrysanthemum Throne and is likely to become emperor one day. After him, however, there is nobody left, leaving the Imperial family with a dilemma over whether they should reverse a...