This book is a collection of papers using samples of real language data (corpora) to explore variation in the use of English. This collection celebrates the achievements of Toshio Saito, a pioneer in corpus linguistics within Japan and founder of the Japan Association for English Corpus Studies (JAECS). The main aims throughout the collection are to present practical solutions for methodological and interpretational problems common in such research, and to make the research methods and issues as accessible as possible, to educate and inspire future researchers. Together, the papers represent many different dimensions of variation, including: differences in (frequency of) use under different linguistic conditions; differences