diff --git a/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/InputGraph/InputGraphTests.swift b/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/InputGraph/InputGraphTests.swift
index 0d1f9af..22401cf 100644
--- a/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/InputGraph/InputGraphTests.swift
+++ b/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/InputGraph/InputGraphTests.swift
@@ -188,6 +188,41 @@ final class InputGraphTests: XCTestCase {
         XCTAssertNil(inputGraph.nodes.first(where: {$0.character == "さ"}))
     }
 
+    func testBuildSimpleRoman2KanaInput_7文字_youshou() throws {
+        let correctGraph = CorrectGraph.build(input: [
+            .init(character: "y", inputStyle: .roman2kana),
+            .init(character: "o", inputStyle: .roman2kana),
+            .init(character: "u", inputStyle: .roman2kana),
+            .init(character: "s", inputStyle: .roman2kana),
+            .init(character: "h", inputStyle: .roman2kana),
+            .init(character: "o", inputStyle: .roman2kana),
+            .init(character: "u", inputStyle: .roman2kana),
+        ])
+        let inputGraph = InputGraph.build(input: correctGraph)
+        XCTAssertEqual(
+            inputGraph.nodes.first(where: {$0.character == "よ"}),
+            .init(character: "よ", displayedTextRange: .range(0, 1), inputElementsRange: .range(0, 2), correction: .none)
+        )
+        XCTAssertEqual(
+            inputGraph.nodes.first(where: {$0.character == "う" && $0.displayedTextRange.startIndex == 1}),
+            .init(character: "う", displayedTextRange: .range(1, 2), inputElementsRange: .range(2, 3), correction: .none)
+        )
+        XCTAssertEqual(
+            inputGraph.nodes.first(where: {$0.character == "し"}),
+            .init(character: "し", displayedTextRange: .range(2, 3), inputElementsRange: .startIndex(3), groupId: 0, correction: .none)
+        )
+        XCTAssertEqual(
+            inputGraph.nodes.first(where: {$0.character == "ょ"}),
+            .init(character: "ょ", displayedTextRange: .range(3, 4), inputElementsRange: .endIndex(6), groupId: 0,
+                  correction: .none)
+        )
+        XCTAssertEqual(
+            inputGraph.nodes.first(where: {$0.character == "う" && $0.displayedTextRange.startIndex == 4}),
+            .init(character: "う", displayedTextRange: .range(4, 5), inputElementsRange: .range(6, 7), correction: .none)
+        )
+
+    }
+
     func testBuildMixedInput_2文字_ts() throws {
         let correctGraph = CorrectGraph.build(input: [
             .init(character: "t", inputStyle: .roman2kana),
diff --git a/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/extension Kana2Kanji+InputGraph.swift b/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/extension Kana2Kanji+InputGraph.swift
index 9b086cb..99cdab9 100644
--- a/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/extension Kana2Kanji+InputGraph.swift	
+++ b/Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/ExperimentalTests/extension Kana2Kanji+InputGraph.swift	
@@ -19,7 +19,7 @@ extension Kana2Kanji {
         // 辞書ルックアップによりconvertGraphを構築
         print(#file, "lookup", inputGraph)
         let convertGraph = self.dicdataStore.buildConvertGraph(inputGraph: consume inputGraph, option: option)
-        print(#file, "convert", convertGraph)
+        print(#file, "convert")
         let result = convertGraph.convertAll(option: option, dicdataStore: self.dicdataStore)
         return result
     }
@@ -81,6 +81,31 @@ final class ExperimentalConversionTests: XCTestCase {
         XCTAssertTrue(result.joinedPrevs().contains("紫")) // むらさき
     }
 
+    func testBuildConvertGraph_youshouki() throws {
+        let dicdataStore = DicdataStore(requestOptions: requestOptions())
+        var c = ComposingText()
+        c.insertAtCursorPosition("youshouki", inputStyle: .roman2kana)
+        let correctGraph = CorrectGraph.build(input: c.input)
+        let inputGraph = InputGraph.build(input: consume correctGraph)
+        let convertGraph = dicdataStore.buildConvertGraph(inputGraph: inputGraph, option: requestOptions())
+        XCTAssertEqual(
+            convertGraph.nodes.first {
+                $0.latticeNodes.contains(where: {$0.data.word == "世"})
+            }?.latticeNodes.mapSet {$0.data.ruby}
+                .symmetricDifference(["ヨ", "ヨウ", "ヨウシ", "ヨウショ", "ヨウショウ", "ヨウショウキ"]),
+            []
+        )
+    }
+
+    func testConversion_youshouki() throws {
+        let dicdataStore = DicdataStore(requestOptions: requestOptions())
+        let kana2kanji = Kana2Kanji(dicdataStore: dicdataStore)
+        var c = ComposingText()
+        c.insertAtCursorPosition("youshouki", inputStyle: .roman2kana)
+        let result = kana2kanji._experimental_all(c, option: requestOptions())
+        XCTAssertTrue(result.joinedPrevs().contains("幼少期")) // ようしょうき
+    }
+
     func testConversion() throws {
         let dicdataStore = DicdataStore(requestOptions: requestOptions())
         let kana2kanji = Kana2Kanji(dicdataStore: dicdataStore)