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たまたま， 偶々， 偶偶， 偶， 適
1. by chance, by accident, accidentally, happen to (be, do), unexpectedly, casually
2. occasionally, once in a while, now and then
tbd
そこ， 其処， 其所
1. there (place relatively near listener)
2. there (place just mentioned), that place
3. then (of some incident just spoken of), that (of point just raised)
4. you
tbd
に
1. at (place, time), in, on, during
2. to (direction, state), toward, into
3. for (purpose)
4. because of (reason), for, with
5. by, from
6. as (i.e. in the role of)
7. per, in, for, a (e.g. "once a month")
8. and, in addition to
9. if, although
tbd