Corpus

• sscorpus: A monolingual parallel corpus for sentence simplification
• TMU Japanese Twitter Corpus
• Tokyo Metropolitan University Paraphrase Corpus (TMUP)

Dictionary

• Simple PPDB: Japanese
• MIPA: Mutual Information Based Paraphrase Acquisition via Bilingual Pivoting

Evaluation data

• TMU Japanese Lexical Simplification Dataset
• TMU Japanese Compound Verb Paraphrase Dataset
• TMU Japanese Word Similarity Dataset

Misc

• English Spelling Error Log Extracted from an English Word Typing Game