diff --git a/keyboards/voyager/keymaps/manna-harbour_miryoku/config.h b/keyboards/voyager/keymaps/manna-harbour_miryoku/config.h
new file mode 100644
index 00000000000..e3e814c4dba
--- /dev/null
+++ b/keyboards/voyager/keymaps/manna-harbour_miryoku/config.h
@@ -0,0 +1,38 @@
+// Copyright 2023 Manna Harbour
+// https://github.com/manna-harbour/miryoku
+
+// This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+#pragma once
+
+#define XXX KC_NO
+
+#if defined (MIRYOKU_MAPPING_SHIFTED_ROWS)
+#define LAYOUT_miryoku( \
+     K00, K01, K02, K03, K04,      K05, K06, K07, K08, K09, \
+     K10, K11, K12, K13, K14,      K15, K16, K17, K18, K19, \
+     K20, K21, K22, K23, K24,      K25, K26, K27, K28, K29, \
+     N30, N31, K32, K33, K34,      K35, K36, K37, N38, N39 \
+) \
+LAYOUT_voyager( \
+XXX, K00, K01, K02, K03, K04,      K05, K06, K07, K08, K09, XXX, \
+XXX, K10, K11, K12, K13, K14,      K15, K16, K17, K18, K19, XXX, \
+XXX, K20, K21, K22, K23, K24,      K25, K26, K27, K28, K29, XXX, \
+XXX, XXX, XXX, K32, K33, K34,      K35, K36, K37, XXX, XXX, XXX, \
+                    XXX, XXX,      XXX, XXX \
+)
+#else
+#define LAYOUT_miryoku( \
+     K00, K01, K02, K03, K04,      K05, K06, K07, K08, K09, \
+     K10, K11, K12, K13, K14,      K15, K16, K17, K18, K19, \
+     K20, K21, K22, K23, K24,      K25, K26, K27, K28, K29, \
+     N30, N31, K32, K33, K34,      K35, K36, K37, N38, N39 \
+) \
+LAYOUT_voyager( \
+XXX, XXX, XXX, XXX, XXX, XXX,      XXX, XXX, XXX, XXX, XXX, XXX, \
+XXX, K00, K01, K02, K03, K04,      K05, K06, K07, K08, K09, XXX, \
+XXX, K10, K11, K12, K13, K14,      K15, K16, K17, K18, K19, XXX, \
+XXX, K20, K21, K22, K23, K24,      K25, K26, K27, K28, K29, XXX, \
+                    K33, K34,      K35, K36 \
+)
+#endif
diff --git a/keyboards/voyager/keymaps/manna-harbour_miryoku/keymap.c b/keyboards/voyager/keymaps/manna-harbour_miryoku/keymap.c
new file mode 100644
index 00000000000..dbab7f98204
--- /dev/null
+++ b/keyboards/voyager/keymaps/manna-harbour_miryoku/keymap.c
@@ -0,0 +1,4 @@
+// Copyright 2019 Manna Harbour
+// https://github.com/manna-harbour/miryoku
+
+// This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>.
diff --git a/keyboards/voyager/keymaps/manna-harbour_miryoku/rules.mk b/keyboards/voyager/keymaps/manna-harbour_miryoku/rules.mk
new file mode 100644
index 00000000000..5aea56081fa
--- /dev/null
+++ b/keyboards/voyager/keymaps/manna-harbour_miryoku/rules.mk
@@ -0,0 +1,4 @@
+# Copyright 2023 Manna Harbour
+# https://github.com/manna-harbour/miryoku
+
+MIRYOKU_KLUDGE_THUMBCOMBOS=yes
diff --git a/users/manna-harbour_miryoku/readme.org b/users/manna-harbour_miryoku/readme.org
index 4621117526d..a11a7885974 100644
--- a/users/manna-harbour_miryoku/readme.org
+++ b/users/manna-harbour_miryoku/readme.org
@@ -759,6 +759,19 @@ make torn:manna-harbour_miryoku:flash
 #+END_SRC
 
 
+**** voyager
+
+[[#thumb-combos][Thumb combos]] are enabled automatically for this keyboard.
+
+An alternative subset mapping is provided with all keys shifted up one row creating thumb keys in the original alpha area.  To select this mapping, append ~MIRYOKU_MAPPING=SHIFTED_ROWS~ to the ~make~ command line when building.
+
+Example build command lines:
+
+#+BEGIN_SRC sh :tangle no
+make voyager:manna-harbour_miryoku:flash # default
+make voyager:manna-harbour_miryoku:flash MIRYOKU_MAPPING=SHIFTED_ROWS # shifted rows
+#+END_SRC
+
 ** Additional and Experimental Features