public void test_wordBased_ja_checkRedundantSeparator() {
        try {
            // Spaces are not valid separators in Japanese
            PeriodFormat.wordBased(JA).parsePeriod("2\u65E5 ");
            fail("No exception was caught");
        } catch (Exception e) {
            assertEquals(IllegalArgumentException.class, e.getClass());
        }
    }