{"url":"/dataset/obp","name":"OBP","full_name":"Open Bandit Dataset","description_markdown":"Open Bandit Dataset is a public real-world logged bandit feedback data. The dataset is provided by ZOZO, Inc., the largest Japanese fashion e-commerce company with over 5 billion USD market capitalization (as of May 2020). The company uses multi-armed bandit algorithms to recommend fashion items to users in a large-scale fashion e-commerce platform called ZOZOTOWN.\r\n\r\nSource: [OBP](https://github.com/st-tech/zr-obp)","description_withheld":null,"homepage":"https://github.com/st-tech/zr-obp","introduced_date":null,"introduced_date_note":null,"introduced_by":{"paper":"/paper/a-large-scale-open-dataset-for-bandit","title":"Open Bandit Dataset and Pipeline: Towards Realistic and Reproducible Off-Policy Evaluation","first_author":"Yuta Saito","url":null},"license":null,"modalities":[],"tasks":[],"languages":[{"name":"Japanese","url":"/datasets/language/japanese"}],"variants":["OBP"],"data_loaders":[{"repo":"https://github.com/st-tech/zr-obp","url":"https://github.com/st-tech/zr-obp","frameworks":[]}],"num_papers_in_archive":7,"source":{"archive":"pwc-archive (Hugging Face), CC BY-SA 4.0","snapshot":"2025-07-28"},"benchmarks":[],"papers_with_a_benchmark_row":[],"syntology_totals":{"read_at":"2026-09-24T18:15:14+00:00","papers_with_samples":0,"samples_harvested":0,"samples_ran":0,"samples_unverified":0,"pointer_only_for_licence":0,"papers_with_no_sample_that_ran":0,"note":"the per-paper counts above, summed; not a rate"},"papers_note":"The archive never published its papers-using-dataset list; these are papers with a leaderboard row on this dataset's benchmarks."}