If you cannot find a reliable digital copy, or if the style is too difficult, here are the top alternatives:
彼の意見は＿＿＿＿が狭く、柔軟性に欠ける。 Shin Kanzen Master N1 Kanji Pdf
Characters are categorized into three levels of difficulty and then ordered alphabetically within those levels. Each entry includes all possible readings and relevant vocabulary words. If you cannot find a reliable digital copy,
It covers 677 kanji , which are considered the "final chunk" needed for the N1 exam. Shin Kanzen Master N1 Kanji Pdf
: Reviewers from Nipponrama note that it includes exercises on uncommon kanji meanings and written comprehension of complex texts, which are often the "trap" questions that trip up N1 candidates. The N1 Learner's Dilemma