diff --git a/native/jni/Android.mk b/native/jni/Android.mk
index 0631b22..f56223f 100644
--- a/native/jni/Android.mk
+++ b/native/jni/Android.mk
@@ -57,7 +57,6 @@
         dic_node_utils.cpp \
         dic_nodes_cache.cpp) \
     $(addprefix suggest/core/dictionary/, \
-        char_utils.cpp \
         binary_dictionary_format.cpp \
         byte_array_utils.cpp \
         dictionary.cpp \
@@ -76,7 +75,8 @@
         typing_scoring.cpp \
         typing_suggest_policy.cpp \
         typing_traversal.cpp \
-        typing_weighting.cpp)
+        typing_weighting.cpp) \
+    utils/char_utils.cpp
 
 LOCAL_SRC_FILES := \
     $(LATIN_IME_JNI_SRC_FILES) \
diff --git a/native/jni/src/bigram_dictionary.cpp b/native/jni/src/bigram_dictionary.cpp
index b572278..59d1b19 100644
--- a/native/jni/src/bigram_dictionary.cpp
+++ b/native/jni/src/bigram_dictionary.cpp
@@ -24,9 +24,9 @@
 #include "suggest/core/dictionary/binary_dictionary_info.h"
 #include "suggest/core/dictionary/binary_format.h"
 #include "suggest/core/dictionary/bloom_filter.h"
-#include "suggest/core/dictionary/char_utils.h"
 #include "suggest/core/dictionary/dictionary.h"
 #include "suggest/core/dictionary/probability_utils.h"
+#include "utils/char_utils.h"
 
 namespace latinime {
 
diff --git a/native/jni/src/correction.cpp b/native/jni/src/correction.cpp
index 3dc2f37..feed562 100644
--- a/native/jni/src/correction.cpp
+++ b/native/jni/src/correction.cpp
@@ -20,11 +20,11 @@
 
 #include "correction.h"
 #include "defines.h"
-#include "suggest/core/dictionary/char_utils.h"
 #include "suggest/core/layout/proximity_info_state.h"
 #include "suggest/core/layout/touch_position_correction_utils.h"
 #include "suggest/policyimpl/utils/edit_distance.h"
 #include "suggest/policyimpl/utils/damerau_levenshtein_edit_distance_policy.h"
+#include "utils/char_utils.h"
 
 namespace latinime {
 
diff --git a/native/jni/src/correction.h b/native/jni/src/correction.h
index 3f60d48..84d6429 100644
--- a/native/jni/src/correction.h
+++ b/native/jni/src/correction.h
@@ -21,8 +21,8 @@
 
 #include "correction_state.h"
 #include "defines.h"
-#include "suggest/core/dictionary/char_utils.h"
 #include "suggest/core/layout/proximity_info_state.h"
+#include "utils/char_utils.h"
 
 namespace latinime {
 
diff --git a/native/jni/src/suggest/core/dicnode/dic_node.h b/native/jni/src/suggest/core/dicnode/dic_node.h
index 14bd2d5..3f64d07 100644
--- a/native/jni/src/suggest/core/dicnode/dic_node.h
+++ b/native/jni/src/suggest/core/dicnode/dic_node.h
@@ -22,8 +22,8 @@
 #include "suggest/core/dicnode/dic_node_profiler.h"
 #include "suggest/core/dicnode/dic_node_properties.h"
 #include "suggest/core/dicnode/dic_node_release_listener.h"
-#include "suggest/core/dictionary/char_utils.h"
 #include "suggest/core/dictionary/digraph_utils.h"
+#include "utils/char_utils.h"
 
 #if DEBUG_DICT
 #define LOGI_SHOW_ADD_COST_PROP \
diff --git a/native/jni/src/suggest/core/dicnode/dic_node_utils.cpp b/native/jni/src/suggest/core/dicnode/dic_node_utils.cpp
index 46dbe43..3deee1a 100644
--- a/native/jni/src/suggest/core/dicnode/dic_node_utils.cpp
+++ b/native/jni/src/suggest/core/dicnode/dic_node_utils.cpp
@@ -22,11 +22,11 @@
 #include "suggest/core/dicnode/dic_node_vector.h"
 #include "suggest/core/dictionary/binary_dictionary_info.h"
 #include "suggest/core/dictionary/binary_format.h"
-#include "suggest/core/dictionary/char_utils.h"
 #include "suggest/core/dictionary/multi_bigram_map.h"
 #include "suggest/core/dictionary/probability_utils.h"
 #include "suggest/core/layout/proximity_info.h"
 #include "suggest/core/layout/proximity_info_state.h"
+#include "utils/char_utils.h"
 
 namespace latinime {
 
diff --git a/native/jni/src/suggest/core/dictionary/binary_format.h b/native/jni/src/suggest/core/dictionary/binary_format.h
index 3bacc09..1b57793 100644
--- a/native/jni/src/suggest/core/dictionary/binary_format.h
+++ b/native/jni/src/suggest/core/dictionary/binary_format.h
@@ -20,10 +20,10 @@
 #include <cstdlib>
 #include <stdint.h>
 
-#include "hash_map_compat.h"
 #include "suggest/core/dictionary/bloom_filter.h"
-#include "suggest/core/dictionary/char_utils.h"
 #include "suggest/core/dictionary/probability_utils.h"
+#include "utils/char_utils.h"
+#include "utils/hash_map_compat.h"
 
 namespace latinime {
 
diff --git a/native/jni/src/suggest/core/dictionary/digraph_utils.cpp b/native/jni/src/suggest/core/dictionary/digraph_utils.cpp
index e8cdd53..f53e56e 100644
--- a/native/jni/src/suggest/core/dictionary/digraph_utils.cpp
+++ b/native/jni/src/suggest/core/dictionary/digraph_utils.cpp
@@ -18,7 +18,7 @@
 
 #include "defines.h"
 #include "suggest/core/dictionary/binary_format.h"
-#include "suggest/core/dictionary/char_utils.h"
+#include "utils/char_utils.h"
 
 namespace latinime {
 
diff --git a/native/jni/src/suggest/core/dictionary/multi_bigram_map.h b/native/jni/src/suggest/core/dictionary/multi_bigram_map.h
index b17c758..ba97e58 100644
--- a/native/jni/src/suggest/core/dictionary/multi_bigram_map.h
+++ b/native/jni/src/suggest/core/dictionary/multi_bigram_map.h
@@ -18,9 +18,9 @@
 #define LATINIME_MULTI_BIGRAM_MAP_H
 
 #include "defines.h"
-#include "hash_map_compat.h"
 #include "suggest/core/dictionary/binary_dictionary_info.h"
 #include "suggest/core/dictionary/binary_format.h"
+#include "utils/hash_map_compat.h"
 
 namespace latinime {
 
diff --git a/native/jni/src/suggest/core/layout/proximity_info.cpp b/native/jni/src/suggest/core/layout/proximity_info.cpp
index 0b5d71a..80355c1 100644
--- a/native/jni/src/suggest/core/layout/proximity_info.cpp
+++ b/native/jni/src/suggest/core/layout/proximity_info.cpp
@@ -23,10 +23,10 @@
 
 #include "defines.h"
 #include "jni.h"
-#include "suggest/core/dictionary/char_utils.h"
 #include "suggest/core/layout/additional_proximity_chars.h"
 #include "suggest/core/layout/geometry_utils.h"
 #include "suggest/core/layout/proximity_info_params.h"
+#include "utils/char_utils.h"
 
 namespace latinime {
 
diff --git a/native/jni/src/suggest/core/layout/proximity_info.h b/native/jni/src/suggest/core/layout/proximity_info.h
index 6d2ddd4..6ca2fdd 100644
--- a/native/jni/src/suggest/core/layout/proximity_info.h
+++ b/native/jni/src/suggest/core/layout/proximity_info.h
@@ -18,9 +18,9 @@
 #define LATINIME_PROXIMITY_INFO_H
 
 #include "defines.h"
-#include "hash_map_compat.h"
 #include "jni.h"
 #include "suggest/core/layout/proximity_info_utils.h"
+#include "utils/hash_map_compat.h"
 
 namespace latinime {
 
diff --git a/native/jni/src/suggest/core/layout/proximity_info_state.cpp b/native/jni/src/suggest/core/layout/proximity_info_state.cpp
index 412d550..4e53992 100644
--- a/native/jni/src/suggest/core/layout/proximity_info_state.cpp
+++ b/native/jni/src/suggest/core/layout/proximity_info_state.cpp
@@ -23,10 +23,10 @@
 #include <vector>
 
 #include "defines.h"
-#include "suggest/core/dictionary/char_utils.h"
 #include "suggest/core/layout/geometry_utils.h"
 #include "suggest/core/layout/proximity_info.h"
 #include "suggest/core/layout/proximity_info_state_utils.h"
+#include "utils/char_utils.h"
 
 namespace latinime {
 
diff --git a/native/jni/src/suggest/core/layout/proximity_info_state.h b/native/jni/src/suggest/core/layout/proximity_info_state.h
index a971294..0079ab5 100644
--- a/native/jni/src/suggest/core/layout/proximity_info_state.h
+++ b/native/jni/src/suggest/core/layout/proximity_info_state.h
@@ -21,9 +21,9 @@
 #include <vector>
 
 #include "defines.h"
-#include "hash_map_compat.h"
 #include "suggest/core/layout/proximity_info_params.h"
 #include "suggest/core/layout/proximity_info_state_utils.h"
+#include "utils/hash_map_compat.h"
 
 namespace latinime {
 
diff --git a/native/jni/src/suggest/core/layout/proximity_info_state_utils.h b/native/jni/src/suggest/core/layout/proximity_info_state_utils.h
index 1837c7a..66fe079 100644
--- a/native/jni/src/suggest/core/layout/proximity_info_state_utils.h
+++ b/native/jni/src/suggest/core/layout/proximity_info_state_utils.h
@@ -21,7 +21,7 @@
 #include <vector>
 
 #include "defines.h"
-#include "hash_map_compat.h"
+#include "utils/hash_map_compat.h"
 
 namespace latinime {
 class ProximityInfo;
diff --git a/native/jni/src/suggest/core/layout/proximity_info_utils.h b/native/jni/src/suggest/core/layout/proximity_info_utils.h
index 3588f4d..54f7539 100644
--- a/native/jni/src/suggest/core/layout/proximity_info_utils.h
+++ b/native/jni/src/suggest/core/layout/proximity_info_utils.h
@@ -20,10 +20,10 @@
 #include <cmath>
 
 #include "defines.h"
-#include "hash_map_compat.h"
-#include "suggest/core/dictionary/char_utils.h"
 #include "suggest/core/layout/additional_proximity_chars.h"
 #include "suggest/core/layout/geometry_utils.h"
+#include "utils/char_utils.h"
+#include "utils/hash_map_compat.h"
 
 namespace latinime {
 class ProximityInfoUtils {
diff --git a/native/jni/src/suggest/policyimpl/typing/typing_traversal.h b/native/jni/src/suggest/policyimpl/typing/typing_traversal.h
index e066418..e21b318 100644
--- a/native/jni/src/suggest/policyimpl/typing/typing_traversal.h
+++ b/native/jni/src/suggest/policyimpl/typing/typing_traversal.h
@@ -22,11 +22,11 @@
 #include "defines.h"
 #include "suggest/core/dicnode/dic_node.h"
 #include "suggest/core/dicnode/dic_node_vector.h"
-#include "suggest/core/dictionary/char_utils.h"
 #include "suggest/core/layout/proximity_info_state.h"
 #include "suggest/core/policy/traversal.h"
 #include "suggest/core/session/dic_traverse_session.h"
 #include "suggest/policyimpl/typing/scoring_params.h"
+#include "utils/char_utils.h"
 
 namespace latinime {
 class TypingTraversal : public Traversal {
diff --git a/native/jni/src/suggest/policyimpl/typing/typing_weighting.h b/native/jni/src/suggest/policyimpl/typing/typing_weighting.h
index 36d496a..17fa110 100644
--- a/native/jni/src/suggest/policyimpl/typing/typing_weighting.h
+++ b/native/jni/src/suggest/policyimpl/typing/typing_weighting.h
@@ -19,11 +19,11 @@
 
 #include "defines.h"
 #include "suggest/core/dicnode/dic_node_utils.h"
-#include "suggest/core/dictionary/char_utils.h"
 #include "suggest/core/layout/touch_position_correction_utils.h"
 #include "suggest/core/policy/weighting.h"
 #include "suggest/core/session/dic_traverse_session.h"
 #include "suggest/policyimpl/typing/scoring_params.h"
+#include "utils/char_utils.h"
 
 namespace latinime {
 
diff --git a/native/jni/src/suggest/policyimpl/utils/damerau_levenshtein_edit_distance_policy.h b/native/jni/src/suggest/policyimpl/utils/damerau_levenshtein_edit_distance_policy.h
index 09f986a..81614bc 100644
--- a/native/jni/src/suggest/policyimpl/utils/damerau_levenshtein_edit_distance_policy.h
+++ b/native/jni/src/suggest/policyimpl/utils/damerau_levenshtein_edit_distance_policy.h
@@ -17,8 +17,8 @@
 #ifndef LATINIME_DAEMARU_LEVENSHTEIN_EDIT_DISTANCE_POLICY_H
 #define LATINIME_DAEMARU_LEVENSHTEIN_EDIT_DISTANCE_POLICY_H
 
-#include "suggest/core/dictionary/char_utils.h"
 #include "suggest/policyimpl/utils/edit_distance_policy.h"
+#include "utils/char_utils.h"
 
 namespace latinime {
 
diff --git a/native/jni/src/unigram_dictionary.cpp b/native/jni/src/unigram_dictionary.cpp
index 8fd015c..5820a1d 100644
--- a/native/jni/src/unigram_dictionary.cpp
+++ b/native/jni/src/unigram_dictionary.cpp
@@ -21,12 +21,12 @@
 #include "defines.h"
 #include "suggest/core/dictionary/binary_dictionary_info.h"
 #include "suggest/core/dictionary/binary_format.h"
-#include "suggest/core/dictionary/char_utils.h"
 #include "suggest/core/dictionary/dictionary.h"
 #include "suggest/core/dictionary/digraph_utils.h"
 #include "suggest/core/dictionary/probability_utils.h"
 #include "suggest/core/dictionary/terminal_attributes.h"
 #include "suggest/core/layout/proximity_info.h"
+#include "utils/char_utils.h"
 #include "unigram_dictionary.h"
 #include "words_priority_queue.h"
 #include "words_priority_queue_pool.h"
diff --git a/native/jni/src/suggest/core/dictionary/char_utils.cpp b/native/jni/src/utils/char_utils.cpp
similarity index 99%
rename from native/jni/src/suggest/core/dictionary/char_utils.cpp
rename to native/jni/src/utils/char_utils.cpp
index 8d40e54..0e70396 100644
--- a/native/jni/src/suggest/core/dictionary/char_utils.cpp
+++ b/native/jni/src/utils/char_utils.cpp
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-#include "suggest/core/dictionary/char_utils.h"
+#include "utils/char_utils.h"
 
 #include <cstdlib>
 
@@ -37,7 +37,7 @@
  *    $ apt-get install libicu-dev
  *
  * 3. Build the following code
- *    $ g++ -o char_utils -I../../.. -DUPDATING_CHAR_UTILS char_utils.cpp -licuuc
+ *    $ g++ -o char_utils -I.. -DUPDATING_CHAR_UTILS char_utils.cpp -licuuc
  */
 #ifdef UPDATING_CHAR_UTILS
 #include <stdio.h>
@@ -70,8 +70,7 @@
  *
  * 5. Update the SORTED_CHAR_MAP[] array below with the output above.
  *    Then, rebuild with -DCONFIRMING_CHAR_UTILS and confirm the program exits successfully.
- *    $ g++ -o char_utils -I../../.. -DUPDATING_CHAR_UTILS -DCONFIRMING_CHAR_UTILS char_utils.cpp \
- *      -licuuc
+ *    $ g++ -o char_utils -I.. -DUPDATING_CHAR_UTILS -DCONFIRMING_CHAR_UTILS char_utils.cpp -licuuc
  *    $ ./char_utils
  *    $
  */
diff --git a/native/jni/src/suggest/core/dictionary/char_utils.h b/native/jni/src/utils/char_utils.h
similarity index 100%
rename from native/jni/src/suggest/core/dictionary/char_utils.h
rename to native/jni/src/utils/char_utils.h
diff --git a/native/jni/src/hash_map_compat.h b/native/jni/src/utils/hash_map_compat.h
similarity index 100%
rename from native/jni/src/hash_map_compat.h
rename to native/jni/src/utils/hash_map_compat.h