Mark and Focus analysis
Yoshino River Withdrawal Limits Return After a Temporary Lift
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The Japan Water Agency reinstated second-stage withdrawal limits on the Yoshino River on November 5. Its operating record shows why the same stage can translate into different cuts for Kagawa and for different Tokushima allocations.
The Japan Water Agency restarted second-stage withdrawal limits for the Yoshino River at 9 a.m. on November 5. The limits followed a temporary lifting of restrictions on October 25, during which Tokushima’s voluntary conservation of an unused industrial allocation stayed in place. The restart shows how a shared basin can move between operating conditions without changing every allocation in the same way.
The Same Stage, Different Cuts
Kagawa’s withdrawal reduction was 30 percent. The agency reported 19.4 percent for Tokushima overall, alongside a 30 percent cut in one category and a 54.5 percent cut in the unused category. These are restrictions on specified allocations, not a schedule of interruptions to taps. The larger cut to an unused allocation cannot be read as the same percentage reduction in the water people or businesses had already been using.
This is why the label “second stage” is only the beginning of the instruction. For a user preparing to change operations, the number that matters is the one attached to the relevant allocation. For a planner comparing drought measures, the comparison also needs to distinguish water already being taken from water held under an allocation but not being used.
Why the Earlier Lift Matters
The basin moved from its summer drought restrictions to winter and spring restrictions on October 11. The agency then logged the October 25 pause and the November 5 restart. The temporary lift left the voluntary cut of four cubic meters per second from Tokushima’s unused industrial allocation in effect. Keeping that line in the record shows that lifting the staged restrictions did not restore every potential withdrawal to its former level.
The agency’s dated sequence is more informative than treating the restriction as a single continuous cut. It shows when an instruction changed, which users were affected and which constraint continued through the pause. It does not establish how much water users ultimately saved. That would require measurements of what was taken before and after each change.
Take-Out
When a basin reinstates a restriction, users need the actual reduction for their allocation. A shared drought stage can mask materially different cuts, even for neighboring users drawing on the same river.
Questions and answers
What readers should know
- When did the second-stage limits restart?
- At 9 a.m. local time on November 5, 2026.
- What was Kagawa’s reduction?
- The Japan Water Agency reported a 30 percent withdrawal reduction.
- Did Tokushima face the same overall reduction?
- No. Its reported overall reduction was 19.4 percent, with different figures for individual allocation categories.
- What continued when the restrictions were temporarily lifted?
- A voluntary four cubic meters per second cut from an unused Tokushima industrial water allocation.
- Do the listed percentages measure actual water savings?
- No. They describe restrictions on withdrawals. Actual savings require measured water use.
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