diff --git a/app/src/main/java/com/k2fsa/sherpa/onnx/MainActivity.kt b/app/src/main/java/com/k2fsa/sherpa/onnx/MainActivity.kt
index d62312c..766fdce 100644
--- a/app/src/main/java/com/k2fsa/sherpa/onnx/MainActivity.kt
+++ b/app/src/main/java/com/k2fsa/sherpa/onnx/MainActivity.kt
@@ -1964,7 +1964,9 @@ class MainActivity : AppCompatActivity() {
                         isEcho(s2.text, tr, echoJaccardTh(s2.text)) ->
                             Log.i(TAG, "MISS sid=" + s2.id + " reason=seg-echo")
                         !targetLangOk(tr) ->
-                            Log.i(TAG, "MISS sid=" + s2.id + " reason=seg-drift")
+                            Log.i(TAG, "MISS sid=" + s2.id + " reason=seg-drift" +
+                                    " sample=" + tr.take(24).replace("
+", " "))
                         else -> if (s2.trans != tr) {
                             s2.trans = tr
                             s2.line?.let { touched.add(it) }
@@ -2073,8 +2075,10 @@ class MainActivity : AppCompatActivity() {
                     Log.i(TAG, "MISS sid=" + sid + " reason=echo")
                 !targetLangOk(tr) -> {
                     val att = bumpAttempt(sid)
-                    Log.i(TAG, "MISS sid=" + sid + " reason=langdrift attempt=" + att)
-                    if (att <= 2) drift.add(Pair(sid, src))
+                    Log.i(TAG, "MISS sid=" + sid + " reason=langdrift attempt=" +
+                            att + " sample=" + tr.take(24).replace("
+", " "))
+                    if (att <= 1) drift.add(Pair(sid, src))
                 }
                 else -> good[sid] = tr
             }
@@ -2277,8 +2281,9 @@ class MainActivity : AppCompatActivity() {
         if (tr.length < 12) return true
         return when (uiLanguage()) {
             "ja" -> {
+                val kana = tr.count { it.code in 0x3040..0x30FF }
                 val latin = tr.count { it in 'a'..'z' || it in 'A'..'Z' }
-                tr.count { it.code in 0x3040..0x30FF } * 25 >= tr.length &&
+                kana >= 2 && kana * 50 >= tr.length &&
                         latin * 3 <= tr.length
             }
             "zh" -> {