diff --git a/web/src/app/globals.css b/web/src/app/globals.css
index 4d82ddd8d..6a8666e29 100644
--- a/web/src/app/globals.css
+++ b/web/src/app/globals.css
@@ -1877,9 +1877,14 @@
     .journal-article-header > p {
       font-size: 18px;
     }
+    /* Korean breaks between words, as English does. At 390, 2,640 of the
+       4,458 line breaks in the 37 Korean posts fell inside a word. A word
+       longer than the line still breaks rather than running off it. */
     .journal-reading {
       font-size: 15px;
       line-height: 1.68;
+      word-break: keep-all;
+      overflow-wrap: break-word;
     }
     .journal-reading h1,
     .journal-reading h2 {
diff --git a/web/src/components/journal/journalCss.test.ts b/web/src/components/journal/journalCss.test.ts
index d28d9fe8a..b7318cdb1 100644
--- a/web/src/components/journal/journalCss.test.ts
+++ b/web/src/components/journal/journalCss.test.ts
@@ -389,3 +389,27 @@ describe("journal dates on a phone", () => {
     expect(px(value!)).toBeGreaterThanOrEqual(13);
   });
 });
+
+// Below 721px a post's text broke Korean words wherever a line ran out: on 28
+// October, 2,640 of the 4,458 line breaks in the 37 Korean posts at 390 (59%)
+// fell between two Hangul syllables of one word, and 59 to 60% at 360 and 430.
+// Breaking only at spaces leaves a long English word or address to
+// overflow-wrap.
+
+describe("journal words on a phone", () => {
+  const phone = mediaBlocks(css, "(max-width: 720px)").flatMap(rules);
+  const last = (selector: string, property: string) =>
+    phone
+      .filter((r) => r.selectors.includes(selector))
+      .map((r) => declaration(r.body, property))
+      .filter(Boolean)
+      .at(-1);
+
+  it("breaks a post's Korean only between words", () => {
+    expect(last(".journal-reading", "word-break")).toBe("keep-all");
+  });
+
+  it("still breaks a word too long for the line", () => {
+    expect(last(".journal-reading", "overflow-wrap")).toMatch(/^(break-word|anywhere)$/);
+  });
+});