Japan's longest river 4 Little Words

“Japan's longest river” answer

The 4 Little Words answer for “Japan's longest river” (Saturday, August 15, 2026, Puzzle 10) is:

SHINANO·7 letters

You can also reveal it one tile at a time above if you'd rather keep some of the challenge.

When else has “Japan's longest river” appeared?

• August 15, 2026 (most recent) → SHINANO

Why the answer is SHINANO

Look for the river that winds through Nagano and Niigata before reaching the Sea of Japan. 🗾

How to build SHINANO from the tiles

In 4 Little Words you don't type the answer — you assemble it from the puzzle's bank of ten tiles, each two to four letters long, and every tile is used exactly once across the four answers. Puzzle 10's tiles for August 15, 2026 are:

PRAE · TOR · PE · TRIF · IED · CER · TAIN · LY · SHI · NANO

SHINANO is built by combining the tiles SHI · NANO in order — 2 of the ten.

What this unlocks

Because the ten tiles cover the four answers exactly, with none left over, placing SHINANO removes 2 tiles from play and makes the rest of Puzzle 10 measurably easier. If this was your third answer, the tiles still sitting on the board are the fourth word — you can often assemble it without working out the clue at all.

More clues from this puzzle

Stuck on another clue? Here are the rest of Puzzle 10's clues for August 15, 2026 — tap any for its answer and tile breakdown:

• ancient Roman magistrate — 7 letters
• turned to stone — 9 letters
• without a doubt — 9 letters

All of the day's answers

Want every puzzle in one place? All ten sets of clues and answers for August 15, 2026 are on the August 15, 2026 answers page, and today's live puzzles are always one tap away on the main 4 Little Words answers page.

About 4 Little Words

4 Little Words is a daily clue-and-tile puzzle from Blue Ox Family Games, the studio behind 7 Little Words. Each board gives four clues and ten letter tiles; you spell every answer by combining tiles, using each tile exactly once, so a finished puzzle leaves nothing behind. Ten puzzles publish every day — edited by Joe Jordan — and reset at midnight Eastern Time. This one ran on a Saturday.