This is how I would say this: 1). Yesterday, due to a lack of sleep, I slept for a full 12 hours. ( "full" being optional, but is more expressive) 2). Yesterday, due to a lack of sleep, I ended up sleeping for 12 hours (a little less formal) 3). Recently, I have been sleep deprived, and last night I slept for 12 hours. (alternative,less than formal) 4). I haven't been getting any sleep (recently), so last night I ended up sleeping for 12 hours straight. ( very informal and expressive). Situation would dictate which option I would choose. Some variation of those examples. Furthermore, saying :"Yesterday, I was lack of sleep." is not an incorrect way of stating that fact, however, to me it sounds more like a "poetic expression". Something you might read in a book. Then following it up with : "Therefore I had slept for 12 hours"; this causes your writing to sound very standard [cause and effect]. This makes it sound more like you are answering questions presented by a teacher (or giving a report), instead of having a fluid conversation (which might be might be case though). Now this sentence does not connect to the other sentences and their topics, so if your intent is to give an account of a trip you are on, be sure to provide context. If you do want these sentences to connect, you could posibly start the next sentence with "However, I am fully enjoying life in Aomori and GW." The following sentence lacks context: "The dinner is Sushi and Basashi." unless someone asked you "what IS for dinner". If this is a past tense account you are giving, then maybe say : "For dinner [last night], I had Sushi and Basashi." Something along those lines. If you want it to sound a little fancy, as if you were writing a blog or something, I might say : Served for dinner was sushi with basashi. Basashi, which is sliced raw horse, is quite delicious. Hopefully these examples were helpful. I am not a teacher, just a few examples that come to mind Happy Journey.