これはおそらく戸籍上の出生年月日を調べた上で修正したのではないかと思います。

Sentence Analyzer

English Translation

I believe this may be a correction after investigation of his date of birth in the family register.

Furigana

これはおそらく戸籍上(こせきじょう)の出生(しゅっしょう)年月日(ねんがっぴ)を調(しら)べた上(うえ)で修正(しゅうせい)したのではないかと思(おも)います。

Romanji

Kore wa osoraku kosekijō no shusshō nengappi o shirabeta ue de shūseishita no de wa nai ka to omoimasu.

Words

此れ (これ)

this (indicating an item near the speaker, the action of the speaker, or the current topic); this person (usu. indicating someone in one's in-group); now; here; I (me); certainly

は (は)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

恐らく (おそらく)

perhaps; likely; probably; I dare say

の (の)

indicates possessive; nominalizes verbs and adjectives; substitutes for "ga" in subordinate phrases; (at sentence-end, falling tone) indicates a confident conclusion; (at sentence-end) indicates emotional emphasis; (at sentence-end, rising tone) indicates question

出生 (しゅっしょう、しゅっせい)

birth

年月日 (ねんがっぴ)

date

を (を)

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

調べる (しらべる)

to examine; to investigate; to check up; to sense; to study; to inquire; to search

上 (うえ)

above; up; over; elder (e.g. daughter); top; summit; surface; on; before; previous; superiority; one's superior (i.e. one's elder); on top of that; besides; what's more; upon (further inspection, etc.); based on (and occurring after); matters concerning...; as concerns ...; since (i.e. "for that reason"); suffix indicating higher social standing; place of one's superior (i.e. the throne); emperor; sovereign; shogun; daimyo; noblewoman (esp. the wife of a nobleman)

で (で、にて)

indicates location of action; at; in; indicates time of action; indicates means of action; cause of effect; by; and then; so; indicates continuing action; indicates certainty, emphasis, etc.

修正 (しゅうせい)

amendment; correction; revision; modification; alteration; retouching; update; fix

だ (だ)

be; is; indicates past or completed action; indicates light imperative

ない (ない)

not; emphatic suffix

か (か)

indicates a question (sometimes rhetorical); or; whether or not; some- (e.g. something, someone); indicates doubt, uncertainty, etc.; emphatic prefix; suffix forming adjectives or adverbs; in that way

と (と)

if; when; and; with; particle used for quoting (with speech, thoughts, etc.); quoting particle; promoted pawn; indicates question (sentence end)

思う (おもう)

to think; to consider; to believe; to think (of doing); to plan (to do); to judge; to assess; to regard; to imagine; to suppose; to dream; to expect; to look forward to; to feel; to desire; to want; to recall; to remember