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We report detections of new exoplanets from a radial velocity (RV) survey ofmetal-rich FGK stars by using three telescopes. By optimizing our RV analysismethod to long time-baseline observations, we have succeeded in detecting fivenew Jovian-planets around three metal-rich stars HD 1605, HD 1666, and HD 67087with the masses of $1.3 M_{\odot}$, $1.5 M_{\odot}$, and $1.4 M_{\odot}$,respectively. A K1 subgiant star HD 1605 hosts two planetary companions withthe minimum masses of $ M_p \sin i = 0.96 M_{\mathrm{JUP}}$ and $3.5M_{\mathrm{JUP}}$ in circular orbits with the planets' periods $P = 577.9$ daysand $2111$ days, respectively. HD 1605 shows a significant linear trend in RVs.Such a system consisting of Jovian planets in circular orbits has rarely beenfound and thus HD 1605 should be an important example of a multi-planetarysystem that is likely unperturbed by planet-planet interactions. HD 1666 is aF7 main sequence star which hosts an eccentric and massive planet of $ M_p \sini = 6.4 M_{\mathrm{JUP}}$ in the orbit with $a_{\rm p} = 0.94$ AU and aneccentricity $e=0.63$. Such an eccentric and massive planet can be explained asa result of planet-planet interactions among Jovian planets. While we havefound the large residuals of $\mathrm{rms} = 35.6\ \mathrm{m\ s^{-1}}$, theperiodogram analysis does not support any additional periodicities. Finally, HD67087 hosts two planets of $ M_p \sin i = 3.1 M_{\mathrm{JUP}}$ and $4.9M_{\mathrm{JUP}}$ in orbits with $P=352.2$ days and $2374$ days, and $e=0.17$and $0.76$, respectively. Although the current RVs do not lead to accuratedeterminations of its orbit and mass, HD 67087 c can be one of the mosteccentric planets ever discovered in multiple systems.

Five New Exoplanets Orbiting Three Metal-Rich, Massive Stars: Two-Planet Systems Including Long-Period Planets, and an Eccentric Planet