This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these messages) .mw-parser-output .hidden-begin{box-sizing:border-box;width:100%;padding:5px;border:none;font-size:95%}.mw-parser-output .hidden-title{font-weight:bold;line-height:1.6;text-align:left}.mw-parser-output .hidden-content{text-align:left}@media all and (max-width:500px){.mw-parser-output .hidden-begin{width:auto!important;clear:none!important;float:none!important))You can help expand this article with text translated from the corresponding article in Japanese. (December 2016) Click [show] for important translation instructions. View a machine-translated version of the Japanese article. Machine translation, like DeepL or Google Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. You must provide copyright attribution in the edit summary accompanying your translation by providing an interlanguage link to the source of your translation. A model attribution edit summary is Content in this edit is translated from the existing Japanese Wikipedia article at [[:ja:長谷部優]]; see its history for attribution. You may also add the template ((Translated|ja|長谷部優)) to the talk page. For more guidance, see Wikipedia:Translation. This biography of a living person needs additional citations for verification. Please help by adding reliable sources. Contentious material about living persons that is unsourced or poorly sourced must be removed immediately from the article and its talk page, especially if potentially libelous.Find sources: "Yu Hasebe" – news · newspapers · books · scholar · JSTOR (May 2011) (Learn how and when to remove this message) (Learn how and when to remove this message)

This section of a biography of a living person does not include any references or sources. Please help by adding reliable sources. Contentious material about living people that is unsourced or poorly sourced must be removed immediately.Find sources: "Yu Hasebe" – news · newspapers · books · scholar · JSTOR (January 2013) (Learn how and when to remove this message)