考え: thought, opinion

図鑑: An illustrated reference book, such as a field guide, bestiary, guide book, or picture book

監視網: surveillance network

関与: taking part in / 干与: being concerned with

関与: take part in / 干与: be concerned with

巻頭: opening page of book; beginning of an essay; prefatory / 敢闘: fighting bravely / 完投: going the whole distance; pitching a whole game / 官等: official rank / 竿頭: top of a pole

関東: Kanto / 間島

Ah! Oh!

The hiragana syllable あ (a). Its equivalent in katakana is ア (a). It is the first syllable in the gojūon order; its position is あ行あ段 (a-gyō a-dan, “row a, section a”).

(obsolete) ridge between rice fields; ridge between groves