diff --git a/LanguageServer/src/main/java/org/nittalab/dtram/languageserver/utils/SemanticAnalyzer.java b/LanguageServer/src/main/java/org/nittalab/dtram/languageserver/utils/SemanticAnalyzer.java
index bc9107b..5f1e4ae 100644
--- a/LanguageServer/src/main/java/org/nittalab/dtram/languageserver/utils/SemanticAnalyzer.java
+++ b/LanguageServer/src/main/java/org/nittalab/dtram/languageserver/utils/SemanticAnalyzer.java
@@ -26,6 +26,7 @@
         tokens = analyzeAtomicTokens(tokens);
         tokens = analyzeStringTokens(tokens);
         tokens = analyzeTypeTokens(tokens);
+        tokens = analyzeKeywordTokens(tokens);
         // TODO: Analyze functions and constants at least.
         return tokens;
     }
@@ -151,4 +152,31 @@
         }
         return newTokens;
     }
+
+    /**
+     * Analyzes keyword tokens.
+     *
+     * @param tokens The tokens to be analyzed
+     * @return The tokens with analyzed type tokens.
+     * @author Shohei Yamagiwa
+     * @since 0.1
+     */
+    protected static List<Token> analyzeKeywordTokens(List<Token> tokens) {
+        List<Token> newTokens = new ArrayList<>();
+        for (Token token : tokens) {
+            if (token instanceof SemanticToken) {
+                newTokens.add(token);
+                continue;
+            }
+            switch (token.getText()) {
+                case Keywords.INIT, Keywords.CHANNEL, Keywords.NATIVE,
+                     Keywords.IN, Keywords.REF, Keywords.OUT, Keywords.SUB_CHANNEL -> {
+                    SemanticToken newToken = new SemanticToken(SemanticTokenTypes.Keyword, token);
+                    newTokens.add(newToken);
+                }
+                default -> newTokens.add(token);
+            }
+        }
+        return newTokens;
+    }
 }