Makera ~
I found it

! You're remembering both song titles correctly [Time Traveller and Milky Way], and they're both on the same tape "Tenku," produced in 1986. The picture on the front is almost a profile, with his hair blowing from behind, and nearly covering his whole face, with part of his forehead, of his left eye, and of his nose showing. It's in black and white with cloudiness against darkness behind him.
The
other songs on it are:
Tenku; Romance; Wings; Aura; Message from the Cosmos; and Legend of the Road. It also has a poem on the inside, written by Kitaro in what looks like [in his small writing beneath his signatures ~ both English and Japanese] 1986, with possibly an abbreviation for September:
"I send a message of sound
Towards the sky
Engulfing empty space
Soaring far beyond grasp
High above mountain tops
Beyond ocean waves
Stretching to reach the Andes
And lightly touching Nepal
Watch as the sounds flow
Listen as you feel the wind blow
Nature is colored with romance
Unfolding a drama day by day
Plants breathe a rhythm
Insects play their melody
Light flies as wind cries
Now catch the sound...feel the light
By feeling things which are with life
Innocents respond to the delicate sigh
Of the world, weaving their own dreams
Dreams which spread throughout the world
People begin to sing harmonies of love, wordless
This is a beginning
Connecting the dream
To the color of your breathless heart
Peace and tranquility, you need only to sing
It is for you."
I also have by him "Kojiki" [produced in 1990] with the songs: Hajimari [In the Beginning]; Sozo [The Birth of a Land]; Koi [Love and The Death of Izanami]; Orochi [The Eight-Headed Dragon]; Nageki [Sorrow in a World of Darkness]; Matsuri [The Festival]; and Reimei [The New Dawn].
Then, my dear Silk Road [produced in 1981 in W. Germany] ~ which has become separated from its sleeve. I first heard it in 1983. However, I have "Kitaro / Silk Road Suite" of his music, so presumably all the songs are same/same. It's performed by the London Symphony Orchestra, with conductor Paul Buckmaster. So, the songs on Silk Road would be: Tienshan; Peace; Journey; Silk Road Theme; Drifting Sand; Fragrance of Nature; Silk Road Fantasy; Time; Flying Celestial Nymphs; Silk Road Theme Andante; Everlasting Road; Bell Tower; Sunset; Westbound; and Magical Sand Dance. With "All compositions by Kitaro" on the sleeve, I'm certain the songs number no more, no less than what's on Silk Road.
I remember the Moog synthesizer, and the Moog/Bach tape sounds familiar. If I've heard it, I don't have a specific recollection, but it sounds beautiful. Maybe I just heard about it.
~ Elizabeth