Patent and non-patent literature
How to find Japanese patent?

Depending on your purpose, Japanese patent information can be found from following sources.
Available Japanese patent databases:
Japanese

English

Search strategies
You may want to use classifications (IPC, F-Term, File Index), keyword strings and combination to search Japanese patents. Let’s use IPDL database provided by JPO as examples to illustrate the search screens.

    F-term or FI classification search
    You can find Japanese patents by using F-term and/or FI:
    Using F-term and/FI

    Example: please refer to the screenshot below.
    find patent by using F-term and/or FI

    Find patent from number
    You can easily get Japanese patent document if you have already had a number:
    Find document from number

    Screenshot:
    find from number

Japanese searchers

What we do?

What we do:
Patent and non-patent literature search, and
Translation
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Longest patents

Longest patents:
No. of claims : 8,962 (US Patent App. No. 20030173072)
No. of pages : 7,154 (US20070224201A1)
No. of words : >1,000,000 (US5,146,591)
No. of characters : >20,000,000 (US5,146,591)
No. of figures : 6881 sheets (US20070224201A1)

From: http://erikjheels.com/?p=152

Number of patents filed at JPO in last 10 years

Number of patents filed at JPO:

Year / Number of patents filed / Ratio to the previous year
2003 / 413,092 / 98.1%
2004 / 423,081 / 102.4%
2005 / 427,078 / 100.9%
2006 / 408,674 / 95.7%
2007 / 396,291 / 97.0%
2008 / 391,002 / 98.7%
2009 / 348,596 / 89.2%
2010 / 344,598 / 98.9%
2011 / 342,610 / 99.4%
2012 / 342,796 / 100.1%
2013 / 328,436 / 95.8%