Tsundoku·The act of leaving a book unread after buying it, typically piled up together with other such unread books.
Hikikomori·The phenomenon of reclusive adolescents or adults who withdraw from social life, often seeking extreme degrees of isolation and confinement.
別腹(Betsubara)·Literally extra stomach, usually used by children to explain why they have room for dessert even when they are already full from dinner.
Aizuchi·To interject into a monologue with a short phrase to indicate understanding and active listening.
Thomasson·A useless relic or structure that has been preserved as part of a building or the built environment.
Mikkabouzu 三日坊主·Literally A three-day monk, meaning someone who gives up too easily or can't stick to something.
干物女 (Himono-onna)·(noun) A woman with little to no interest in relationships, and that prefers to stay at home lazying around; especially when showing a social face while outside.
Honne (本音)·The contrast between what one truly believes honne and what beliefs one displays in public tatemae.
Hibakusha·A term used to refer to those who survived the atomic bombings of Hiroshima and Nagasaki; literally translates as explosion-affected people.
立ち読み·Tachiyomi (lit. standing reading) standing and reading (sometimes for lengthy periods) through magazines or books before/without purchasing them. Usually seen at corner shops and bookstores.