diff --git a/simtool.h b/simtool.h
index 843673493..64f9a7824 100644
--- a/simtool.h
+++ b/simtool.h
@@ -726,7 +726,24 @@ public:
 	bool init( player_t *player ) OVERRIDE {
 		if(  !env_t::networkmode  ||  player->is_public_service()  ) {
 			// in networkmode only for public player
-			welt->change_time_multiplier( atoi(default_param) );
+			
+			// [mod : shingoushori] change_time_multiplier_xt 1/6
+			// This modify is assumed to be written in menuconf.tab as shown below, if used.
+			// # toolbar[0][31]=simple_tool[7],,.,+1
+			// # toolbar[0][32]=simple_tool[7],,COMMA,-1
+			// toolbar[0][31]=simple_tool[7],,.,^+1
+			// toolbar[0][32]=simple_tool[7],,COMMA,^-1
+			int factor = atoi(default_param);
+			if (factor != 0) {
+				welt->change_time_multiplier( factor );
+			} else {
+				if (strlen(default_param) > 0){
+					if (default_param[0] == '^'){
+						char *c_xt = (char*)&default_param[1];
+						welt->change_time_multiplier_xt( atoi(c_xt) );
+					}
+				}
+			}
 		}
 		return false;
 	}
diff --git a/simworld.cc b/simworld.cc
index a024cf03c..04c951e9f 100644
--- a/simworld.cc
+++ b/simworld.cc
@@ -2006,6 +2006,8 @@ karte_t::karte_t() :
 	network_frame_count = 0;
 	sync_steps = 0;
 	sync_steps_barrier = sync_steps;
+	// [mod : shingoushori] change_time_multiplier_xt 2/6
+	step_fast_forward = 100;
 
 	for(  uint i=0;  i<MAX_PLAYER_COUNT;  i++  ) {
 		selected_tool[i] = tool_t::general_tool[TOOL_QUERY];
@@ -6199,6 +6201,54 @@ void karte_t::change_time_multiplier(sint32 delta)
 }
 
 
+// [mod : shingoushori] change_time_multiplier_xt 3/6
+void karte_t::change_time_multiplier_xt(sint32 delta)
+{
+	if(step_mode==FAST_FORWARD) {
+		uint32 step_fast_forward_plan = step_fast_forward;
+		if(delta<0) {
+			delta = sint32(pow(2,-delta));
+			step_fast_forward_plan /= delta;
+		}
+		else {
+			delta = sint32(pow(2,delta));
+			step_fast_forward_plan *= delta;
+		}
+		if(step_fast_forward_plan<=10000) {
+			step_fast_forward = step_fast_forward_plan; 
+		}
+		else {
+			step_fast_forward = 10000;
+		}
+		if(step_fast_forward<100) {
+			step_fast_forward = 100;
+		}
+
+		return;
+	}
+	uint32 time_multiplier_plan = time_multiplier;
+	if(delta<0) {
+		delta = sint32(pow(2,-delta));
+		time_multiplier_plan /= delta;
+	}
+	else {
+		delta = sint32(pow(2,delta));
+		time_multiplier_plan *= delta;
+	}
+	if(time_multiplier_plan<=3200) {
+		time_multiplier = time_multiplier_plan;
+	}
+	if(time_multiplier<=0) {
+		time_multiplier = 1;
+	}
+
+	if(step_mode!=NORMAL) {
+		step_mode = NORMAL;
+		reset_timer();
+	}
+}
+
+
 void karte_t::set_pause(bool p)
 {
 	bool pause = step_mode&PAUSE_FLAG;
@@ -6733,7 +6783,8 @@ bool karte_t::interactive(uint32 quit_month)
 			}
 			else {
 				if(  step_mode==FAST_FORWARD  ) {
-					sync_step( 100, true, false );
+					// [mod : shingoushori] change_time_multiplier_xt 4/6
+					sync_step( step_fast_forward, true, false );
 					set_random_mode( STEP_RANDOM );
 					step();
 					clear_random_mode( STEP_RANDOM );
diff --git a/simworld.h b/simworld.h
index ac04b6d30..15879bdd4 100644
--- a/simworld.h
+++ b/simworld.h
@@ -492,6 +492,10 @@ private:
 
 	// The maximum sync_steps that a client can safely advance to.
 	uint32 sync_steps_barrier;
+
+ 	// [mod : shingoushori] change_time_multiplier_xt 5/6
+	uint32 step_fast_forward;
+	
 #define LAST_CHECKLISTS_COUNT 64
 	/// @note variable used in interactive()
 	checklist_t last_checklists[LAST_CHECKLISTS_COUNT];
@@ -1027,6 +1031,8 @@ public:
 
 	sint32 get_time_multiplier() const { return time_multiplier; }
 	void change_time_multiplier( sint32 delta );
+	// [mod : shingoushori] change_time_multiplier_xt 6/6
+	void change_time_multiplier_xt( sint32 delta );
 
 	/**
 	 * @return 0=winter, 1=spring, 2=summer, 3=autumn