A senpai is used when the person who are referred to are older than that person who are speaking. In Japanese society, especially for middle-schoolers and highschoolers, 呼び捨て (yobi-sute) or calling someone older than you without adding senpai are considered rude.
"House".
It's a ships name - most, if not all Japanese vessels end with the suffix maru.
Apparently it means little or child in Japanese. That's why you see lots of female names ending with ko.
の君 is just a thing to tack onto a name with someone you are familiar with.
Owari.
Chingzing is not a Japanese name. Japanese names must end with a vowel or the letter N.
Og Ag is not a Japanese name. Japanese names must end with a vowel or N.
iska does not occur on the end of Japanese names. desuka on the end of a sentence is denotes a question with the verb to be
'Nanda' sounds Japanese but the o in the end could be just an interjection. 'Nanda' could mean different things when used in different situations, it could mean 'what??', 'what is it?', 'what (is that/did you say/etc) or sometimes at the end of sentence it adds something like 'it's like that', 'that's how it is' to the sentence. You might mean 'Nandou' which is a Japanese name.
"Do not forget [object]"
End of the Spring
ip is not a Japanese word. Japanese words must end with a vowel or the letter N.