エッチ（ecchi）{expression, occasionally used in Anime/Manga; "perverted"}
夢「ゆめ」（yume）{dream}
まったく（mattaku）{expression, in Anime, often used like jeez/geez}
下げ「さげ」（sage）{expression, used in emails in a context of "Feeling Down"; means to fall, bring down, etc}
かわいい（kawaii）{cute, adorable}
すごい（sugoi）{expression, used to indicate amazement; "Amazing/Incredible"}
やおい（yaoi）{essentially, regarding boy-boy relationships, many manga are based around yaoi, or "boy love"}
おめでとう（omedetou）{expression of congratulation, literally means "congratulations"}
向日葵「ひまわり」（himawari）{Sunflower}
狐耳「きつねみみ」（kitsunemimi）{Fox ears}
さよなら（sayonara）{goodbye, farewell}
おす！（osu!）{with a number of different meanings,1. osu! is used in Martial Arts as a form of greeting,farewell and acknowledgement(Move prevalent in Karate); 2. A shortened version of "ohayo gozaimasu" {Good Morning}}
煩い「うるさい」（urusai）{"Noisy"; often used as "You're too loud, be quiet"}
バカ（baka）{expression, generally means "idiot, fool, stupid"}
嘘だ「うそだ」（uso da）{uso: Lie/ to Lie (As in, dishonesty); "That's a Lie!"}
母「はは」（haha）{Mother}
黒板「こくばん」（kokuban）{Blackboard}
ゴミ箱「ごみばこ」（gomibako）{Trashcan}
サメ「さめ」（same）{Shark}
芋「いも」（imo）{Potato}
奇跡「きせき」（kiseki）{Miracle;Miraculous}
ケーキ「けーき」（ke-ki）{Cake}
闇「やみ」（yami）{Darkness}
本当に「ほんとうに」（hontou ni）{"really" used in the context "anata wa hontou ni sagashiteru ka?" {Are you really searching?}, etc}
俺「おれ」（ore）{Masculine/Very informal version of "I/me", generally used only in very casual environments, and generally by men}
水「みず」（mizu）{cold water}
僕「ぼく」（boku）{Slightly Masculine version of "I/me", more formal than ore, generally used by younger males}
元気「げんき」（genki）{Energy; also used to ask a person how they are "o genki desu ka?"{are you well?}}
願い「ねがい」（negai）{Wish/Request}
本物「ほんもの」（honmono）{Real/Real Thing}
静か「しずか」（shizuka）{Quiet/Quietly}
幸せ「しあわせ」（shiawase）{Happy/Happiness}
です（desu）{Roughly "To be/is"; "Watashi wa nijuusai desu"{I am twenty years old}}
面白い「おもしろい」（omoshiroi）{Interesting/Fascinating}
友達「ともだち」（tomodachi）{Friend}
ご飯「ご飯」（gohan）{Rice}
絶望「ぜつぼう」（zetsubou）{Despair}