diff --git a/config/assets.yml b/config/assets.yml
index 948fbc6c..dae47196 100644
--- a/config/assets.yml
+++ b/config/assets.yml
@@ -355,3 +355,11 @@ config/rel.yml:
   mFM_rail_pal_12:
     addrs: [0x80F8C448, 0x80F8C468]
     type: pal16
+  # ac_koinobori
+  aKOI_obj_e_koinobori_a_pal:
+    addrs: [0x806C5900, 0x806C5920]
+    type: pal16
+  obj_e_koinobori_b_pal:
+    addrs: [0x806C5920, 0x806C5940]
+    type: pal16
+    
\ No newline at end of file
diff --git a/config/rel_slices.yml b/config/rel_slices.yml
index ad671b5d..d052842b 100644
--- a/config/rel_slices.yml
+++ b/config/rel_slices.yml
@@ -430,6 +430,10 @@ ac_haniwa.c:
     .text: [0x80427624, 0x80428F64]
     .rodata: [0x806440B8, 0x806440F8]
     .data: [0x80683D08, 0x80683E98]
+ac_koinobori.c:
+    .text: [0x805B27B8, 0x805B2AE0]
+    .data: [0x806C58A0, 0x806C5940]
+    .rodata: [0x8064A978, 0x8064A990]
 ac_rope.c:
     .text: [0x804967A4, 0x80496AB8]
     .rodata: [0x80644DB0,0x80644DB8]
diff --git a/include/ac_koinobori.h b/include/ac_koinobori.h
index b232f942..afc6ea3d 100644
--- a/include/ac_koinobori.h
+++ b/include/ac_koinobori.h
@@ -3,6 +3,7 @@
 
 #include "types.h"
 #include "m_actor.h"
+#include "c_keyframe.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -10,6 +11,22 @@ extern "C" {
 
 extern ACTOR_PROFILE Koinobori_Profile;
 
+typedef void (*KOINOBORI_PROC)(ACTOR*, GAME*);
+
+/* sizeof(KOINOBORI_ACTOR) == 0x2DC */
+typedef struct actor_koinobori_s{
+    /* 0x000 */ ACTOR actor_class;
+    /* 0x174 */ int _174; // Unused
+    /* 0x178 */ cKF_SkeletonInfo_R_c keyframe;
+    /* 0x1E8 */ int _1E8; // Unused
+    /* 0x1EC */ s_xyz work[15];
+    /* 0x246 */ s_xyz morph[15];
+    /* 0x2A0 */ KOINOBORI_PROC action_proc;
+    /* 0x2A4 */ u8 _2A4[0x2B4 - 0x2A4]; // Unused
+    /* 0x2B4 */ int action;
+    /* 0x2B8 */ u8 _2B8[0x2DC - 0x2B8]; // Unused
+} KOINOBORI_ACTOR;
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/include/m_name_table.h b/include/m_name_table.h
index b0e01b95..fb13b49f 100644
--- a/include/m_name_table.h
+++ b/include/m_name_table.h
@@ -2699,6 +2699,7 @@ extern int mNT_check_unknown(mActor_name_t item_no);
 #define DUMMY_RADIO 0xF109
 #define DUMMY_MIKUJI 0xF10D
 #define DUMMY_TAMA 0xF110
+#define DUMMY_KOINOBORI 0xF114
 #define DUMMY_DOUZOU 0xF11D
 #define DUMMY_NAMEPLATE 0xF11F
 #define DUMMY_BOAT 0xF128
diff --git a/src/ac_koinobori.c b/src/ac_koinobori.c
new file mode 100644
index 00000000..5a965ae6
--- /dev/null
+++ b/src/ac_koinobori.c
@@ -0,0 +1,71 @@
+#include "ac_koinobori.h"
+
+#include "m_name_table.h"
+#include "sys_matrix.h"
+#include "m_lib.h"
+#include "m_rcp.h"
+#include "m_common_data.h"
+#include "m_player_lib.h"
+
+enum {
+  aKOI_ACTION_WAIT,
+};
+
+static void aKOI_actor_ct(ACTOR* actor, GAME* game);
+static void aKOI_actor_dt(ACTOR* actor, GAME* game);
+static void aKOI_actor_init(ACTOR* actor, GAME* game);
+static void aKOI_actor_draw(ACTOR* actor, GAME* game);
+
+ACTOR_PROFILE Koinobori_Profile = {
+  mAc_PROFILE_KOINOBORI,
+  ACTOR_PART_ITEM,
+  ACTOR_STATE_TA_SET,
+  KOINOBORI_WINDSOCK,
+  ACTOR_OBJ_BANK_KEEP,
+  sizeof(KOINOBORI_ACTOR),
+  &aKOI_actor_ct,
+  &aKOI_actor_dt,
+  &aKOI_actor_init,
+  &aKOI_actor_draw,
+  NULL
+};
+
+extern cKF_Skeleton_R_c cKF_bs_r_obj_e_koinobori;
+extern Vtx obj_e_koinobori_shadow_v[];
+extern Gfx obj_e_koinobori_shadowT_model[];
+extern cKF_Animation_R_c cKF_ba_r_obj_e_koinobori;
+
+u8 aKOI_shadow_vtx_fix_flg_table[8] = {
+    1, 0, 0, 1,
+    1, 0, 0, 1
+};
+
+bIT_ShadowData_c aKOI_shadow_data = {
+    8,
+    aKOI_shadow_vtx_fix_flg_table,
+    60.0f,
+    obj_e_koinobori_shadow_v,
+    obj_e_koinobori_shadowT_model,
+};
+
+static void aKOI_setup_action(KOINOBORI_ACTOR* actor, int action);
+
+static void aKOI_actor_ct(ACTOR* actor, GAME* game) {
+    KOINOBORI_ACTOR* koinobori = (KOINOBORI_ACTOR*)actor;
+
+    actor->cull_height = 830.0f;
+    actor->cull_radius = 480.0f;
+
+    cKF_SkeletonInfo_R_ct(&koinobori->keyframe, &cKF_bs_r_obj_e_koinobori, NULL, koinobori->work, koinobori->morph);
+    aKOI_setup_action(koinobori, aKOI_ACTION_WAIT);
+    cKF_SkeletonInfo_R_play(&koinobori->keyframe);
+}
+
+static void aKOI_actor_dt(ACTOR* actor, GAME* game) {
+    KOINOBORI_ACTOR* koinobori = (KOINOBORI_ACTOR*)actor;
+    cKF_SkeletonInfo_R_dt(&koinobori->keyframe);
+}
+
+#include "../src/ac_koinobori_move.c_inc"
+
+#include "../src/ac_koinobori_draw.c_inc"
diff --git a/src/ac_koinobori_draw.c_inc b/src/ac_koinobori_draw.c_inc
new file mode 100644
index 00000000..eb9fed33
--- /dev/null
+++ b/src/ac_koinobori_draw.c_inc
@@ -0,0 +1,41 @@
+u16 aKOI_obj_e_koinobori_a_pal[] = {
+    #include "assets/aKOI_obj_e_koinobori_a_pal.inc"
+};
+
+u16 obj_e_koinobori_b_pal[] = {
+    #include "assets/obj_e_koinobori_b_pal.inc"
+};
+
+static void aKOI_actor_draw(ACTOR* actor, GAME* game) {
+    KOINOBORI_ACTOR* koinobori;
+    GRAPH* graph;
+    cKF_SkeletonInfo_R_c* keyframe;
+    Mtx* mtx;
+    u16* pal;
+    Gfx* gfx;
+
+
+    koinobori = (KOINOBORI_ACTOR*)actor;
+    graph = game->graph;
+    keyframe = &koinobori->keyframe;
+    mtx = GRAPH_ALLOC_TYPE(graph, Mtx, keyframe->skeleton->num_shown_joints);
+
+    if (mtx != NULL) {
+        pal = Common_Get(clip.structure_clip)->get_pal_segment_proc(aSTR_PAL_KOINOBORI_A);
+
+        _texture_z_light_fog_prim_npc(graph);
+
+        OPEN_DISP(graph);
+        gfx = NOW_POLY_OPA_DISP;
+
+        gSPSegment(gfx++, G_MWO_SEGMENT_8, pal);
+        gSPSegment(gfx++, G_MWO_SEGMENT_9, &obj_e_koinobori_b_pal);
+        gSPSegment(gfx++, G_MWO_SEGMENT_A, &aKOI_obj_e_koinobori_a_pal);
+
+        SET_POLY_OPA_DISP(gfx);
+        CLOSE_DISP(graph);
+
+        cKF_Si3_draw_R_SV(game, keyframe, mtx, NULL, NULL, actor);
+        (*Common_Get(clip).bg_item_clip->draw_shadow_proc)(game, &aKOI_shadow_data, FALSE);
+    }
+}
diff --git a/src/ac_koinobori_move.c_inc b/src/ac_koinobori_move.c_inc
new file mode 100644
index 00000000..3844398c
--- /dev/null
+++ b/src/ac_koinobori_move.c_inc
@@ -0,0 +1,29 @@
+static void aKOI_wait(ACTOR* actor, GAME* game) {
+}
+
+static void aKOI_setup_action(KOINOBORI_ACTOR* koinobori, int action) {
+    static KOINOBORI_PROC process[8] = { &aKOI_wait, NULL, NULL, NULL, NULL, NULL, NULL, NULL };
+
+    cKF_SkeletonInfo_R_init(&koinobori->keyframe, koinobori->keyframe.skeleton, &cKF_ba_r_obj_e_koinobori, 1.0f, 1.0f, 1.0f, 0.5f, 0.0f, TRUE, NULL);
+    koinobori->action_proc = process[action];
+    koinobori->action = action;
+}
+
+static void aKOI_actor_move(ACTOR* actor, GAME* game) {
+    GAME_PLAY* game_play = (GAME_PLAY*)game;
+    KOINOBORI_ACTOR* koinobori = (KOINOBORI_ACTOR*)actor;
+
+    GET_PLAYER_ACTOR(game_play);
+    cKF_SkeletonInfo_R_play(&koinobori->keyframe);
+    koinobori->action_proc(actor, game);
+
+    sAdo_OngenPos((u32)actor, 0x35, &actor->world.position);
+}
+
+static void aKOI_actor_init(ACTOR* actor, GAME* game) {
+    xyz_t pos = actor->home.position;
+
+    mFI_SetFG_common(DUMMY_KOINOBORI, pos, FALSE);
+    aKOI_actor_move(actor, game);
+    actor->mv_proc = aKOI_actor_move;
+}