Police in Japan have tightened security around Emperor Akihito's 12-year-old grandson after two knives were found near his school desk https://t.co/80vLDZevPq https://t.co/NkQ6rTnZZW

Police in Japan have tightened security around Emperor Akihito's 12-year-old grandson after two knives were found near his school desk https://t.co/80vLDZevPq https://t.co/NkQ6rTnZZW (via Twitter http://twitter.com/CNN/status/1122801625125486593)