How accurate is the ふりがな on Aozora Books?


I would love to use Aozra Books as a learning tool, but the accuracy of its
ふりがな concerns me. [This
book](http://www.aozora.gr.jp/cards/000148/files/773_14560.html), for example,
claims 私 is pronounced わたくし instead of わたし.

Is the former a proper pronunciation?




To answer the question in the title, the furigana in Aozora files are the
furigana that were actually used in the printed original. So they are accurate
in the sense that they represent actual usage.

However, because most of the books there are very old (the majority being
prewar), that usage often does not reflect what the Ministry of Education
deems acceptable today. In the first few lines of Ozaki Hōsai's "Yogisha", for
example, I see 離婚{わか}れて and 妾{わたし}.




To answer the question in the title, the furigana in Aozora files are the
furigana that were actually used in the printed original. So they are accurate
in the sense that they represent actual usage.

However, because most of the books there are very old (the majority being
prewar), that usage often does not reflect what the Ministry of Education
deems acceptable today. In the first few lines of Ozaki Hōsai's "Yogisha", for
example, I see 離婚{わか}れて and 妾{わたし}.

