Error code:   ConfigNamesError
Exception:    AttributeError
Message:      'str' object has no attribute 'items'
Traceback:    Traceback (most recent call last):
                File "/src/services/worker/src/worker/job_runners/dataset/config_names.py", line 67, in compute_config_names_response
                  config_names = get_dataset_config_names(
                                 ^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/inspect.py", line 161, in get_dataset_config_names
                  dataset_module = dataset_module_factory(
                                   ^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/load.py", line 1207, in dataset_module_factory
                  raise e1 from None
                File "/usr/local/lib/python3.12/site-packages/datasets/load.py", line 1182, in dataset_module_factory
                  ).get_module()
                    ^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/load.py", line 690, in get_module
                  config_name: DatasetInfo.from_dict(dataset_info_dict)
                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.12/site-packages/datasets/info.py", line 284, in from_dict
                  return cls(**{k: v for k, v in dataset_info_dict.items() if k in field_names})
                                                 ^^^^^^^^^^^^^^^^^^^^^^^
              AttributeError: 'str' object has no attribute 'items'

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Japan Consumer Email Database — Market Intelligence Dataset

48,000,000 verified Japan contacts are available from LeadsBlue →. This open dataset provides the aggregate market intelligence behind that database — contact volume, benchmark open/reply rates, send timing, and compliance for the Japan segment.

At a glance: This dataset provides aggregated market-intelligence on the Japan Consumer Email Database segment — real business-population statistics, cold-email performance benchmarks, and compliance context compiled by LeadsBlue Research.

Key figures

Metric	Value
Verified contacts in segment	48,000,000
Typical email open rate	12-18%
Typical email reply rate	1.5-3.5%
Best send days	Tuesday, Wednesday, Thursday
Best send time (local)	09:00-11:00 JST
Geography	Japan
Industry verticals benchmarked	14
License	CC BY 4.0

📥 Get the full Japan Consumer Email Database — individual verified business records, ready to use: Download from LeadsBlue →

Market overview

Consumer (B2C) segment. Japan is the 4th largest economy globally with approximately 3.5 million registered commercial entities, dominated by an extraordinarily complex corporate ecosystem. The keiretsu system — interlocking networks of businesses that include manufacturers, suppliers, distributors, and financial institutions — means that purchasing decisions within large Japanese companies involve multiple layers of approval (nemawashi — consensus building — can extend the B2B sales cycle to 12-18 months for enterprise deals). Tokyo handles the headquarters of virtually every major Japanese corporation; Osaka is Japan's second commercial centre with manufacturing, pharmaceutical, and retail strengths; Nagoya is the global hub of Toyota's vast automotive supply chain; Fukuoka is a growing startup hub.

Primary business hubs: Tokyo, Osaka, Nagoya, Fukuoka, Sapporo.

Outreach benchmarks & strategy

Cold email in Japan requires a fundamentally different approach than Western markets. Japanese executives receive fewer cold emails than their US or European counterparts — but the cultural norms around unsolicited commercial contact are more conservative. The single highest-leverage action is to send via a warm introduction whenever possible. If cold, the email should be formal (Japanese language if at all possible), extremely brief, humble in tone, reference a specific relevant context, and avoid any pressure for a quick response. Expect response times of 1-3 weeks if there is genuine interest. High-volume automated cadences will damage your brand in the Japanese market.

Files in this dataset

File	Contents
`data/market_overview.csv`	Segment-level metrics: contact volume, benchmark rates, send timing
`data/industry_benchmarks.csv`	Open/reply benchmarks across 14 industry verticals
`data/compliance.csv`	Regulatory framework, business culture, decision-maker profile, hubs

Methodology

Figures are aggregated and anonymized from LeadsBlue's verified contact operations and public business-registry baselines. No personal records are included in this dataset — only segment-level statistics.

How to cite

LeadsBlue Research. (2026). Japan Consumer Email Database — Market Intelligence Dataset. Derived from the B2B Cold Email Benchmark Report 2026 (https://doi.org/10.5281/zenodo.20136256). CC BY 4.0. Source: https://leadsblue.com

@dataset{leadsblue_japan_consumer_email_dataset_2026,
  author    = {Johnson, Luther},
  title     = {Japan Consumer Email Database -- Market Intelligence Dataset},
  year      = {2026},
  publisher = {LeadsBlue Research},
  doi       = {10.5281/zenodo.20136256},
  url       = {https://leadsblue.com/leads/japan-consumer-email-database/}
}

Source & full dataset

This aggregate dataset is published by LeadsBlue Research. The full verified consumer email list — with individual business contact records — is available at Japan Consumer Email Database.

Related resources: Benchmark report (Zenodo) · Research hub · Interactive tools

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