Table 2. Company-classified costs and cost-benefits.

Company	Number of targeted employees	Productivity of attendees with mental discomfort (yen)	Saved leave compensation (yen)	Total benefi (yen)	Benefit per employee (yen)	Cost per employee (yen)	Net benefit (yen)	ROI
A	1,269	4,886,331	3,851	5,535,537	4,362	15,981	–11,619	0.27
B	398	814,388	2,046	3,139,864	7,889	28,611	–20,722	0.28
C	400	8,143,885	20,360	8,143,885	20,360	23,563	–3,203	0.86
D	4,500	15,473,381	3,439	17,608,660	3,913	4,115	–202	0.95
E	450	8,958,273	19,907	9,994,636	22,210	18,849	3,361	1.18
F	2,918	17,102,158	5,861	18,942,179	6,491	5,163	1,329	1.26
G	500	10,587,050	21,174	12,090,875	24,182	13,243	10,939	1.83
H	1,469	34,204,316	23,284	35,460,214	24,139	8,528	15,611	2.83
I	130	7,329,496	56,381	9,249,219	71,148	17,063	54,084	4.17
J	450	8,143,885	18,098	9,708,573	21,575	3,066	18,508	7.04
K	380	2,443,165	6,429	3,251,292	8,556	508	8,048	16.85
Mean	1,169	10,735,121	16,439	12,102,267	19,530	12,608	6,921	1.55