50 Tons of Rare-Earth Mud Recovered Off Minamitorishima — 5ch Asks ‘Does the Math Even Work?’

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News that 50 tons of rare-earth-bearing mud had been successfully recovered from the seabed off Minamitorishima became a hot topic on 5ch’s “Nandemo Jikkyo G” (general live-news) board. While some praised the technical feat of hauling material up from 6,000 meters below the seafloor, plenty of others questioned whether it makes financial sense, with comments like “This’ll cost a hundred times more than just buying from China.”

The thread also saw back-and-forth over whether the mud contains radioactive material and where it would even be refined, leaving the discussion pretty split.

3Anonymous2026/08/22(土) 22:11:07.30ID:GP0kkmpb0
Didn't they already give up on this because it wasn't profitable?
4Anonymous2026/08/22(土) 22:11:25.41ID:2pUQnZJ+d
It's just election-season theater.
7Anonymous2026/08/22(土) 22:12:59.76ID:PRM/jD0H0
What exactly are they mining here?
20Anonymous2026/08/22(土) 22:16:21.12ID:KvxDfaNe0
>>7
Because their radioactivity is close to certain elements'
rare earths are usually found mixed in with stuff like uranium
which makes separating and refining them difficult
87Anonymous2026/08/22(土) 23:27:42.37ID:vVOu1hY50
>>20
Normally yeah, but apparently this particular batch barely has any radioactive material in it
12Anonymous2026/08/22(土) 22:13:43.53ID:rDaEXV8X0
Is this actually gonna turn a profit though?
101Anonymous2026/08/22(土) 23:39:38.84ID:XsJOLdL+0
>>12
Even if it goes well
it'll reportedly end up costing 100 times what they were paying China
121Anonymous2026/08/23(日) 00:02:01.26ID:uf4j3SkU0
>>12
You won't know if it's profitable or not until you actually try it
124Anonymous2026/08/23(日) 00:07:03.25ID:ESBF65aD0
>>12
This is mainly about investing in the technology, not really meant to replace existing resource supply chains
17Anonymous2026/08/22(土) 22:15:23.83ID:1Dm4j0EV0
You can dig up mud in Tokyo Bay too, y'know
24Anonymous2026/08/22(土) 22:17:48.39ID:49HO+Etk0
>>17
Given today's heavy rain, it's probably mixed with a ton of sewage runoff too
26Anonymous2026/08/22(土) 22:19:13.96ID:tZDcBB2t0
There's no way this pencils out if you're comparing it to Chinese pricing
Breaking free from dependence on China is what actually matters here
29Anonymous2026/08/22(土) 22:21:11.02ID:66mIEQPC0
>>26
If it can't compete on price with China, there's no way to break free from them
42Anonymous2026/08/22(土) 22:26:55.05ID:mGjpRdze0
>>26
How do you keep an unprofitable business running long-term?
You a fan of Japan Display and Cool Japan too? (both government-backed initiatives that lost huge sums of money)
31Anonymous2026/08/22(土) 22:22:11.45ID:KetPIHhR0
Apparently just pulling 50 tons up from 6,000 meters underground is a huge achievement in itself, regardless of the rare-earth angle
34Anonymous2026/08/22(土) 22:23:21.71ID:vKpIR8iu0
>>31
Yeah but that ignores the cost-effectiveness
38Anonymous2026/08/22(土) 22:25:07.55ID:ViVEuh1j0
Nice, with 50 tons we won't need to import anymore, right?
41Anonymous2026/08/22(土) 22:25:59.41ID:+b2F2dHY0
>>38
That 50 tons is just the raw mud
The real question is how much usable rare earth you actually get once you extract it from that
48Anonymous2026/08/22(土) 22:32:20.25ID:2kX1Mh+d0
A refining plant on Minamitorishima?? lmaooo
wait, hold on lol
54Anonymous2026/08/22(土) 22:37:34.94ID:AWxEgVjt0
>>48
That's way too short-sighted, lol
56Anonymous2026/08/22(土) 22:38:51.00ID:gq/vyBjW0
Even routing through the Ogasawara Islands, it's still really far
62Anonymous2026/08/22(土) 22:49:58.07ID:vcSMjXjw0
Don't you have to strip out radioactive material from rare earths or something?
And where are they even going to refine/smelt it in a Japan that's allergic to anything nuclear-related?
86Anonymous2026/08/22(土) 23:25:30.00ID:jpxbcozI0
>>62
Apparently stuff pulled from the seabed has very little radioactive material in it
67Anonymous2026/08/22(土) 22:54:39.34ID:HLp/5dl+0
54% is insane
Is the concentration really that high?
I figured it'd be like a few grams per ton
71Anonymous2026/08/22(土) 22:57:53.38ID:mGjpRdze0
>>67
It's not 54% of the full 50 tons
Out of however many grams of rare earth they actually extracted from the 50 tons of mud, 54% of that is medium-to-heavy rare earths
68Anonymous2026/08/22(土) 22:55:49.11ID:7PRwTWzD0
But doesn't mining and refining rare earths cause insane amounts of environmental damage?
China's winning big because they just don't care about that
72Anonymous2026/08/22(土) 22:58:32.12ID:edJme5d4r
>>68
Japan's rare-earth process already solved that problem a while back
75Anonymous2026/08/22(土) 23:01:37.00ID:JKaBDcAUa
>>68
Ocean-mined rare earths have way less radioactive material than land-mined ones, so that issue's basically a non-issue… probably
90Anonymous2026/08/22(土) 23:31:16.26ID:NARx5NQf0
People who keep going on about 'profitability, profitability' — do they even think about how national welfare or the justice system are funded?
Plenty of things get done because they're necessary, profit or no profit
100Anonymous2026/08/22(土) 23:38:51.42ID:apAdU0G70
>>90
If they can use crazy-expensive rare earths to make industrial products and still win on price, sure, why not
108Anonymous2026/08/22(土) 23:45:05.45ID:XsJOLdL+0
>>90
This is exactly the kind of field where profitability isn't optional
96Anonymous2026/08/22(土) 23:36:41.89ID:apAdU0G70
So where are they actually going to refine this stuff?

※This article is excerpted and summarized from the 5ch (Nandemo Jikkyo G) thread “[Good News] 50 Tons of Rare-Earth Mud Successfully Recovered Off Minamitorishima.”

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