Japanese Prime Minister Shinzo Abe in Boston on Monday. Dominick Reuter/AFP/Getty Images hide caption

itoggle caption Dominick Reuter/AFP/Getty Images

Japanese Prime Minister Shinzo Abe with U.S. Defense Secretary Ash Carter earlier this month in Tokyo. Abe's visit to the U.S. this week features an agreement for the Japanese military to have a more active role. Franck Robichon/AP hide caption

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Liu Jianchao (second right), China's assistant foreign minister, shakes hands with Japanese Deputy Foreign Minister Shinsuke Sugiyama (second left) during a meeting in Tokyo, Japan on Thursday. Liu Tan/Xinhua/Landov hide caption

itoggle caption Liu Tan/Xinhua/Landov

Hawaii's Honouliuli Internment Camp held thousands of prisoners of war and hundreds of Japanese-American citizens during World War II Courtesy of Japanese Cultural Center of Hawaii hide caption

itoggle caption Courtesy of Japanese Cultural Center of Hawaii

Misao Okawa, the world's oldest living person, poses for a photo with her son Hiroshi Okawa, 92, (left) and other family members and friends on her 117th birthday celebration at Kurenai Nursing Home in Osaka, Japan. Buddhika Weerasinghe/Getty Images hide caption

itoggle caption Buddhika Weerasinghe/Getty Images

A valve on the Musashi. Courtesy of Paul Allen hide caption

itoggle caption Courtesy of Paul Allen

After designing a soy sauce bottle for Kikkoman in 1961, Kenji Ekuan went on to design everything from motorcycles to a bullet train. Mj-bird/Creative Commons hide caption

itoggle caption Mj-bird/Creative Commons

A passerby watches a TV news program reporting two Japanese hostages, Kenji Goto, left, and Haruna Yukawa, held by the Islamic State group, in Tokyo, on Friday. Eugene Hoshiko/AP hide caption

itoggle caption Eugene Hoshiko/AP

Japan's Chief Cabinet Secretary Yoshihide Suga says the government is working to secure the release of Haruna Yukawa and Kenji Goto. A deadline imposed by the so-called Islamic State for the men's release has lapsed. Koji Sasahara/AP hide caption

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A photo from a video clip posted on YouTube shows a man with a knife threatening two captives identified as Haruna Yukawa (right) and Kenji Goto Jogo. The Islamic State says it wants $200 million for their release. Kyodo /Landov hide caption

itoggle caption Kyodo /Landov

A candlelight vigil in December marks the second anniversary of a high-profile gang rape in India. In that incident, six men raped the girl and beat her while she was traveling with her 28-year-old friend, before throwing them out on the streets. Arkaprava Ghosh/Barcroft Media/Landov hide caption

itoggle caption Arkaprava Ghosh/Barcroft Media/Landov

A customer picks up a block of butter at a food store in Tokyo on Nov. 10. Japanese shoppers are up in arms over a serious butter shortage that has forced Tokyo to resort to emergency imports, as some grocers limit sales to one block per customer. Yoshikazu Tsuno/AFP/Getty Images hide caption

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A woman prepares a Japanese Christmas cake at the Patisserie Akira Cake shop on Dec. 23, 2011. The sponge cake is drenched in symbolic meaning. Buddhika Weerasinghe/Getty Images hide caption

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Japanese Prime Minister Shinzo Abe, leader of the Liberal Democratic Party, smiles as he places a red rosette on the name of his Liberal Democratic Party's winning candidate during ballot counting. Shizuo Kambayashi/AP hide caption

itoggle caption Shizuo Kambayashi/AP