<entry id="2229144" stat="D" corpus="jmdict" type="jmdict">
<ent_corp type="jmdict">jmdict</ent_corp>
<ent_seq>2049120</ent_seq>
<k_ele>
<keb>滄海一滴</keb>
</k_ele>
<r_ele>
<reb>そうかいいってき</reb>
</r_ele>
<sense>
<pos>&n;</pos>
<gloss>a drop in the ocean (bucket)</gloss>
</sense>
<info>
<audit time="2005-06-10 00:00:00" stat="A">
<upd_detl>Entry created</upd_detl>
</audit>
<audit time="2014-08-25 02:13:39" stat="A">
<upd_uid>jwb</upd_uid>
<upd_name>Jim Breen</upd_name>
<upd_email>...address hidden...</upd_email>
<upd_detl>Adding yoji tagAdding yoji tag
-*- via bulkupd.py -*-</upd_detl>
<upd_refs>Kanji Haitani list</upd_refs>
<upd_diff>@@ -11,0 +12 @@
+&lt;misc&gt;&amp;yoji;&lt;/misc&gt;</upd_diff>
</audit>
<audit time="2022-08-01 02:17:07" stat="A">
<upd_uid>jwb</upd_uid>
<upd_name>Jim Breen</upd_name>
<upd_email>...address hidden...</upd_email>
<upd_detl>Remove unsupported yoji tag
-*- via bulkupd.py -*-</upd_detl>
<upd_diff>@@ -12 +11,0 @@
-&lt;misc&gt;&amp;yoji;&lt;/misc&gt;</upd_diff>
</audit>
<audit time="2023-04-19 13:29:44" stat="D" unap="true">
<upd_name>Brian Krznarich</upd_name>
<upd_email>...address hidden...</upd_email>
<upd_detl>Vote delete, curious what references back this up.  There are some kotowaza dictionaries that list this as 類語 for 九牛一毛, but nothing I could find where this was a top-level entry. 

Instead of this, actually common on twitter, but not in kokukos or jmdict, the much simpler: 海の一滴.  But we wouldn't likely create an entry for that. Why this?
https://twitter.com/search?q=%E6%B5%B7%E3%81%AE%E4%B8%80%E6%BB%B4&amp;src=typed_query&amp;f=live

蒼海一滴集 was the title of a single essay collection, and shows up in some searches.  Different kanji for 滄 though.

The [yoji] tag was removed in August as part of a cleanup.  If this was "real", I would think it would have been actually used as [yoji].

For comparison, this similar expression actually exists:
滄海の一粟	201

Another one we have that doesn't exist in any significant measure:
大海一滴	No matches</upd_detl>
<upd_refs>滄海一滴	0	0.0%
滄海の一滴	0	0.0%
滄海一雫	0	0.0%
滄海の一雫	0	0.0%</upd_refs>
</audit>
<audit time="2023-04-21 09:39:42" stat="D">
<upd_uid>robin1354</upd_uid>
<upd_name>Robin Scott</upd_name>
<upd_email>...address hidden...</upd_email>
<upd_detl>It's not in any of the yojijukugo dictionaries we typically check. It can go.</upd_detl>
</audit>
</info>
</entry>